IPv4 Multicast Address Space
Last Updated
- 2026-08-20
Expert(s)
- Stig Venaas
Note
Host Extensions for IP Multicasting RFC 1112 specifies the extensions required of a host implementation of the Internet Protocol (IP) to support multicasting. The multicast addresses are in the range 224.0.0.0 through 239.255.255.255. Address assignments are listed below.
The range of addresses between 224.0.0.0 and 224.0.0.255, inclusive, is reserved for the use of routing protocols and other low-level topology discovery or maintenance protocols, such as gateway discovery and group membership reporting. Multicast routers should not forward any multicast datagram with destination addresses in this range, regardless of its TTL.
Formerly known as
IPv4 Multicast Address Space Registry
Available Formats
Local Network Control Block (224.0.0.0 - 224.0.0.255 (224.0.0/24))
Registration Procedure(s)
- Expert Review, IESG Approval, or Standards Action
Reference
- RFC 5771: IANA Guidelines for IPv4 Multicast Address Assignments
Note
(*) It is only appropriate to use these values in explicitly- configured experiments; they MUST NOT be shipped as defaults in implementations. See RFC 3692 for details.
Request an Assignment
https://www.iana.org/protocols/apply
Available Formats
| Address(es) | Description | References | Change Controller | Date Registered | Last Reviewed |
|---|---|---|---|---|---|
| 224.0.0.0 | Base Address (Reserved) | RFC 1112; Jon Postel | |||
| 224.0.0.1 | All Systems on this Subnet | RFC 1112; Jon Postel | |||
| 224.0.0.2 | All Routers on this Subnet | Jon Postel | |||
| 224.0.0.3 | Unassigned | ||||
| 224.0.0.4 | DVMRP Routers | RFC 1075; Jon Postel | |||
| 224.0.0.5 | OSPFIGP OSPFIGP All Routers | RFC 2328; OSPF WG Chairs | |||
| 224.0.0.6 | OSPFIGP OSPFIGP Designated Routers | RFC 2328; OSPF WG Chairs | |||
| 224.0.0.7 | ST Routers | RFC 1190; Karen Seo | |||
| 224.0.0.8 | ST Hosts | RFC 1190; Karen Seo | |||
| 224.0.0.9 | RIP2 Routers | RFC 1723; Gary S. Malkin | |||
| 224.0.0.10 | EIGRP Routers | RFC 7868 | 1996-03-01 | ||
| 224.0.0.11 | Mobile-Agents | [Bill Simpson] | |||
| 224.0.0.12 | DHCP Server / Relay Agent | [Unknown] | |||
| 224.0.0.13 | All PIM Routers | Dino Farinacci | 1996-03-01 | ||
| 224.0.0.14 | RSVP-ENCAPSULATION | Bob Braden | 1996-04-01 | ||
| 224.0.0.15 | all-cbt-routers | Tony Ballardie; RFC 2189 | 1997-02-01 | ||
| 224.0.0.16 | designated-sbm | Fred Baker | 1997-06-01 | ||
| 224.0.0.17 | all-sbms | Fred Baker | 1997-06-01 | ||
| 224.0.0.18 | VRRP | RFC 3768; RFC 9568 | |||
| 224.0.0.19 | IPAllL1ISs | Tony Przygienda | 1999-10-01 | ||
| 224.0.0.20 | IPAllL2ISs | Tony Przygienda | 1999-10-01 | ||
| 224.0.0.21 | IPAllIntermediate Systems | Tony Przygienda | 1999-10-01 | ||
| 224.0.0.22 | IGMP | Steve Deering | 1999-10-01 | ||
| 224.0.0.23 | GLOBECAST-ID | Piers Scannell | 2000-03-01 | ||
| 224.0.0.24 | OSPFIGP-TE | RFC 4973 | |||
| 224.0.0.25 | router-to-switch | Ishan Wu | 2000-03-01 | ||
| 224.0.0.26 | Unassigned | ||||
| 224.0.0.27 | Al MPP Hello | Brian Martinicky | 2000-03-01 | ||
| 224.0.0.28 | ETC Control | Steve Polishinski | 2000-03-01 | ||
| 224.0.0.29 | GE-FANUC | Ian Wacey | 2000-05-01 | ||
| 224.0.0.30 | indigo-vhdp | Colin Caughie | 2000-05-01 | ||
| 224.0.0.31 | shinbroadband | Sakon Kittivatcharapong | 2000-05-01 | ||
| 224.0.0.32 | digistar | Brian Kerkan | 2000-05-01 | ||
| 224.0.0.33 | ff-system-management | Dave Glanzer | 2003-03-01 | ||
| 224.0.0.34 | pt2-discover | Ralph Kammerlander | 2000-06-01 | ||
| 224.0.0.35 | DXCLUSTER | Dirk Koopman | 2000-07-01 | ||
| 224.0.0.36 | DTCP Announcement | Patrick Cipiere | 2001-01-01 | ||
| 224.0.0.37-224.0.0.68 | zeroconfaddr (renew 12/02) | Erik Guttman | 2001-12-01 | ||
| 224.0.0.69 | all-AODV-RPL-nodes | RFC 9854 | 2025-03-10 | ||
| 224.0.0.70-224.0.0.100 | Unassigned | ||||
| 224.0.0.101 | cisco-nhap | Mark Bakke | 2001-12-01 | ||
| 224.0.0.102 | HSRP | Ian Wilson | 2001-12-01 | ||
| 224.0.0.103 | MDAP | Johan Deleu | 2002-02-01 | ||
| 224.0.0.104 | Nokia MC CH | Morteza Kalhour | 2002-10-01 | ||
| 224.0.0.105 | ff-lr-address | Dave Glanzer | 2003-03-01 | ||
| 224.0.0.106 | All-Snoopers | RFC 4286 | |||
| 224.0.0.107 | PTP-pdelay | NIST: IEEE Std 1588; Kang Lee | 2007-02-02 | ||
| 224.0.0.108 | Saratoga | Lloyd Wood | 2007-08-30 | 2011-03-17 | |
| 224.0.0.109 | LL-MANET-Routers | RFC 5498 | 2011-02-23 | ||
| 224.0.0.110 | IGRS | Xiaoyu Zhou | 2009-01-20 | ||
| 224.0.0.111 | Babel | RFC 8966 | |||
| 224.0.0.112 | MMA Device Discovery | Tom White | 2011-11-02 | ||
| 224.0.0.113 | AllJoyn | Craig Dowell | 2011-11-18 | ||
| 224.0.0.114 | Inter RFID Reader Protocol | Wayne Wenyu Liu | 2012-06-12 | ||
| 224.0.0.115 | JSDP | J. Ryan Stinnett | 2014-07-01 | ||
| 224.0.0.116 | Device discovery/config | COMTECH Kft. | 2016-10-20 | ||
| 224.0.0.117 | DLEP Discovery | RFC 8175 | 2017-04-03 | ||
| 224.0.0.118 | MAAS | Mike Pontillo | 2017-05-19 | ||
| 224.0.0.119 | ALL_GRASP_NEIGHBORS | RFC 8990 | 2017-07-20 | ||
| 224.0.0.120 | 3GPP MBMS SACH | Charles Lo | 3GPP | 2022-11-02 | |
| 224.0.0.121 | ALL_V4_RIFT_ROUTERS | RFC 9692 | 2023-02-17 | ||
| 224.0.0.122 | Network Virtualization Overlay (NVO) BUM Traffic | RFC 9624 | 2024-02-02 | ||
| 224.0.0.123-224.0.0.149 | Unassigned | ||||
| 224.0.0.150 | Ramp AltitudeCDN MulticastPlus | Giovanni Marzot | Ramp Holdings | 2019-03-13 | |
| 224.0.0.151 | Unassigned | ||||
| 224.0.0.152 | WiseHome | Erick MacDonald Filzek | IOT COMPANY SOLUCOES TECNOLOGICAS LTDA | 2023-08-09 | |
| 224.0.0.153-224.0.0.250 | Unassigned | ||||
| 224.0.0.251 | mDNS | RFC 6762 | 2000-04-01 | ||
| 224.0.0.252 | Link-local Multicast Name Resolution | RFC 4795 | 2011-03-17 | ||
| 224.0.0.253 | Teredo | RFC 4380 | 2010-02-14 | ||
| 224.0.0.254 | RFC3692-style Experiment (*) | RFC 4727 | |||
| 224.0.0.255 | Unassigned |
Internetwork Control Block (224.0.1.0 - 224.0.1.255 (224.0.1/24))
Registration Procedure(s)
- Expert Review, IESG Approval, or Standards Action
Reference
- RFC 5771: IANA Guidelines for IPv4 Multicast Address Assignments
Request an Assignment
https://www.iana.org/protocols/apply
Available Formats
| Address(es) | Description | References | Change Controller | Date Registered | Last Reviewed |
|---|---|---|---|---|---|
| 224.0.1.0 | VMTP Managers Group | RFC 1045; Dave Cheriton | |||
| 224.0.1.1 | NTP Network Time Protocol | RFC 5905; David Mills | |||
| 224.0.1.2 | SGI-Dogfight | Andrew Cherenson | |||
| 224.0.1.3 | Rwhod | Steve Deering | |||
| 224.0.1.4 | VNP | Dave Cheriton | |||
| 224.0.1.5 | Artificial Horizons - Aviator | Bruce Factor | |||
| 224.0.1.6 | NSS - Name Service Server | Bill Schilit | |||
| 224.0.1.7 | AUDIONEWS - Audio News Multicast | Martin Forssen | |||
| 224.0.1.8 | SUN NIS+ Information Service | Chuck McManis | |||
| 224.0.1.9 | MTP Multicast Transport Protocol | Susie Armstrong | |||
| 224.0.1.10 | IETF-1-LOW-AUDIO | Steve Casner | |||
| 224.0.1.11 | IETF-1-AUDIO | Steve Casner | |||
| 224.0.1.12 | IETF-1-VIDEO | Steve Casner | |||
| 224.0.1.13 | IETF-2-LOW-AUDIO | Steve Casner | |||
| 224.0.1.14 | IETF-2-AUDIO | Steve Casner | |||
| 224.0.1.15 | IETF-2-VIDEO | Steve Casner | |||
| 224.0.1.16 | MUSIC-SERVICE | ||||
| 224.0.1.17 | SEANET-TELEMETRY | ||||
| 224.0.1.18 | SEANET-IMAGE | ||||
| 224.0.1.19 | MLOADD | Bob Braden | 1996-04-01 | ||
| 224.0.1.20 | any private experiment | Jon Postel | |||
| 224.0.1.21 | DVMRP on MOSPF | [John Moy] | |||
| 224.0.1.22 | SVRLOC | John Veizades | 1995-05-01 | ||
| 224.0.1.23 | XINGTV | Howard Gordon | |||
| 224.0.1.24 | microsoft-ds | <arnoldmµsoft.com> | |||
| 224.0.1.25 | nbc-pro | <bloomer&birch.crd.ge.com> | |||
| 224.0.1.26 | nbc-pfn | <bloomer&birch.crd.ge.com> | |||
| 224.0.1.27 | lmsc-calren-1 | Yea Uang | 1994-11-01 | ||
| 224.0.1.28 | lmsc-calren-2 | Yea Uang | 1994-11-01 | ||
| 224.0.1.29 | lmsc-calren-3 | Yea Uang | 1994-11-01 | ||
| 224.0.1.30 | lmsc-calren-4 | Yea Uang | 1994-11-01 | ||
| 224.0.1.31 | ampr-info | Rob Janssen | 1995-01-01 | ||
| 224.0.1.32 | mtrace | Steve Casner | 1995-01-01 | ||
| 224.0.1.33 | RSVP-encap-1 | Bob Braden | 1996-04-01 | ||
| 224.0.1.34 | RSVP-encap-2 | Bob Braden | 1996-04-01 | ||
| 224.0.1.35 | SVRLOC-DA | John Veizades | 1995-05-01 | ||
| 224.0.1.36 | rln-server | Brian Kean | 1995-08-01 | ||
| 224.0.1.37 | proshare-mc | Mark Lewis | 1995-10-01 | ||
| 224.0.1.38 | Unassigned | ||||
| 224.0.1.39 | cisco-rp-announce | Dino Farinacci | 1996-03-01 | ||
| 224.0.1.40 | cisco-rp-discovery | Dino Farinacci | 1996-03-01 | ||
| 224.0.1.41 | gatekeeper | Jim Toga | 1996-05-01 | ||
| 224.0.1.42 | iberiagames | Jose Luis Marocho | 1996-07-01 | ||
| 224.0.1.43 | nwn-discovery | Arnoud Zwemmer | 1996-11-01 | ||
| 224.0.1.44 | nwn-adaptor | Arnoud Zwemmer | 1996-11-01 | ||
| 224.0.1.45 | isma-1 | Stephen Dunne | 1997-01-01 | ||
| 224.0.1.46 | isma-2 | Stephen Dunne | 1997-01-01 | ||
| 224.0.1.47 | telerate | Wenjie Peng | 1997-01-01 | ||
| 224.0.1.48 | ciena | Mike Rodbell | 1997-01-01 | ||
| 224.0.1.49 | dcap-servers | RFC 2114 | |||
| 224.0.1.50 | dcap-clients | RFC 2114 | |||
| 224.0.1.51 | mcntp-directory | Heiko Rupp | 1997-01-01 | ||
| 224.0.1.52 | mbone-vcr-directory | Wieland Holdfelder | 1997-01-01 | ||
| 224.0.1.53 | heartbeat | Louis Mamakos | 1997-03-01 | ||
| 224.0.1.54 | sun-mc-grp | Michael DeMoney | 1997-04-01 | ||
| 224.0.1.55 | extended-sys | David Poole | 1997-04-01 | ||
| 224.0.1.56 | pdrncs | Paul Wissenbach | 1997-06-01 | ||
| 224.0.1.57 | tns-adv-multi | Jerome Albin | 1997-06-01 | ||
| 224.0.1.58 | vcals-dmu | Masato Shindoh | 1997-08-01 | ||
| 224.0.1.59 | zuba | Dan Jackson | 1997-09-01 | ||
| 224.0.1.60 | hp-device-disc | Shivaun Albright | 1997-07-01 | ||
| 224.0.1.61 | tms-production | Asad Gilani | 1997-07-01 | ||
| 224.0.1.62 | sunscalar | Terry Gibson | 1997-08-01 | ||
| 224.0.1.63 | mmtp-poll | Bryan Costales | 1997-09-01 | ||
| 224.0.1.64 | compaq-peer | Victor Volpe | 1997-10-01 | ||
| 224.0.1.65 | iapp | Bob Meier | 1997-12-01 | ||
| 224.0.1.66 | multihasc-com | Darcy Brockbank | 1997-12-01 | ||
| 224.0.1.67 | serv-discovery | Chas Honton | 1997-12-01 | ||
| 224.0.1.68 | mdhcpdisover | RFC 2730 | |||
| 224.0.1.69 | MMP-bundle-discovery1 | Gary Scott Malkin | 1998-02-01 | ||
| 224.0.1.70 | MMP-bundle-discovery2 | Gary Scott Malkin | 1998-02-01 | ||
| 224.0.1.71 | XYPOINT DGPS Data Feed | NE-TEAM_at_telecomsys.com | 1998-02-01 | ||
| 224.0.1.72 | GilatSkySurfer | Yossi Gal | 1998-02-01 | ||
| 224.0.1.73 | SharesLive | Shane Rowatt | 1997-03-01 | ||
| 224.0.1.74 | NorthernData | [Sheers] | |||
| 224.0.1.75 | SIP | [Schulzrinne] | |||
| 224.0.1.76 | IAPP | Henri Moelard | 1998-03 | ||
| 224.0.1.77 | AGENTVIEW | Ram Iyer | 1998-03-01 | ||
| 224.0.1.78 | Tibco Multicast1 | Raymond Shum | 1998-04-01 | ||
| 224.0.1.79 | Tibco Multicast2 | Raymond Shum | 1998-04-01 | ||
| 224.0.1.80 | MSP | Evan Caves | 1998-06-01 | ||
| 224.0.1.81 | OTT (One-way Trip Time) | Beverly Schwartz | 1998-06-01 | ||
| 224.0.1.82 | TRACKTICKER | Alan Novick | 1998-08-01 | ||
| 224.0.1.83 | dtn-mc | Bob Gaddie | 1998-08-01 | ||
| 224.0.1.84 | jini-announcement | Bob Scheifler | 1998-08-01 | ||
| 224.0.1.85 | jini-request | Bob Scheifler | 1998-08-01 | ||
| 224.0.1.86 | sde-discovery | Peter Aronson | 1998-08-01 | ||
| 224.0.1.87 | DirecPC-SI | Doug Dillon | 1998-08-01 | ||
| 224.0.1.88 | B1RMonitor | Ed Purkiss | 1998-09-01 | ||
| 224.0.1.89 | 3Com-AMP3 dRMON | Prakash Banthia | 1998-09-01 | ||
| 224.0.1.90 | imFtmSvc | Zia Bhatti | 1998-09-01 | ||
| 224.0.1.91 | NQDS4 | Michael Rosenberg | Nasdaq Inc. | 1998-09-01 | |
| 224.0.1.92 | NQDS5 | Michael Rosenberg | Nasdaq Inc. | 1998-09-01 | |
| 224.0.1.93 | NQDS6 | Michael Rosenberg | Nasdaq Inc. | 1998-09-01 | |
| 224.0.1.94 | NLVL12 | Michael Rosenberg | Nasdaq Inc. | 1998-09-01 | |
| 224.0.1.95 | NTDS1 | Michael Rosenberg | Nasdaq Inc. | 1998-09-01 | |
| 224.0.1.96 | NTDS2 | Michael Rosenberg | Nasdaq Inc. | 1998-09-01 | |
| 224.0.1.97 | NODSA | Michael Rosenberg | Nasdaq Inc. | 1998-09-01 | |
| 224.0.1.98 | NODSB | Michael Rosenberg | Nasdaq Inc. | 1998-09-01 | |
| 224.0.1.99 | NODSC | Michael Rosenberg | Nasdaq Inc. | 1998-09-01 | |
| 224.0.1.100 | NODSD | Michael Rosenberg | Nasdaq Inc. | 1998-09-01 | |
| 224.0.1.101 | NQDS4R | Michael Rosenberg | Nasdaq Inc. | 1998-09-01 | |
| 224.0.1.102 | NQDS5R | Michael Rosenberg | Nasdaq Inc. | 1998-09-01 | |
| 224.0.1.103 | NQDS6R | Michael Rosenberg | Nasdaq Inc. | 1998-09-01 | |
| 224.0.1.104 | NLVL12R | Michael Rosenberg | Nasdaq Inc. | 1998-09-01 | |
| 224.0.1.105 | NTDS1R | Michael Rosenberg | Nasdaq Inc. | 1998-09-01 | |
| 224.0.1.106 | NTDS2R | Michael Rosenberg | Nasdaq Inc. | 1998-09-01 | |
| 224.0.1.107 | NODSAR | Michael Rosenberg | Nasdaq Inc. | 1998-09-01 | |
| 224.0.1.108 | NODSBR | Michael Rosenberg | Nasdaq Inc. | 1998-09-01 | |
| 224.0.1.109 | NODSCR | Michael Rosenberg | Nasdaq Inc. | 1998-09-01 | |
| 224.0.1.110 | NODSDR | Michael Rosenberg | Nasdaq Inc. | 1998-09-01 | |
| 224.0.1.111 | MRM | Liming Wei | 1998-10-01 | ||
| 224.0.1.112 | TVE-FILE | Dean Blackketter | 1998-11-01 | ||
| 224.0.1.113 | TVE-ANNOUNCE | Dean Blackketter | 1998-11-01 | ||
| 224.0.1.114 | Mac Srv Loc | Bill Woodcock | 1998-11-01 | ||
| 224.0.1.115 | Simple Multicast | Jon Crowcroft | 1998-11-01 | ||
| 224.0.1.116 | SpectraLinkGW | Mark Hamilton | 1998-11-01 | ||
| 224.0.1.117 | dieboldmcast | Gene Marsh | 1998-11-01 | ||
| 224.0.1.118 | Tivoli Systems | Jon Gabriel | 1998-12-01 | ||
| 224.0.1.119 | pq-lic-mcast | Bob Sledge | 1998-12-01 | ||
| 224.0.1.120 | Pico | Pico Sales | Pico | 2007-03-01 | |
| 224.0.1.121 | Pipesplatform | Daniel Dissett | 1998-12-01 | ||
| 224.0.1.122 | LiebDevMgmg-DM | Mike Velten | 1999-01-01 | ||
| 224.0.1.123 | TRIBALVOICE | Nigel Thompson | 1999-01-01 | ||
| 224.0.1.124 | Unassigned (Retracted 1/29/01) | ||||
| 224.0.1.125 | PolyCom Relay1 | [Coutiere] | |||
| 224.0.1.126 | Infront Multi1 | Morten Lindeman | 1999-03-01 | ||
| 224.0.1.127 | XRX DEVICE DISC | Michael Wang | 1999-03-01 | ||
| 224.0.1.128 | CNN | Joel Lynch | 1999-04-01 | ||
| 224.0.1.129 | PTP-primary | NIST: IEEE Std 1588; Kang Lee | 2007-02-02 | ||
| 224.0.1.130 | PTP-alternate1 | NIST: IEEE Std 1588; Kang Lee | 2007-02-02 | ||
| 224.0.1.131 | PTP-alternate2 | NIST: IEEE Std 1588; Kang Lee | 2007-02-02 | ||
| 224.0.1.132 | PTP-alternate3 | NIST: IEEE Std 1588; Kang Lee | 2007-02-02 | ||
| 224.0.1.133 | ProCast | Shai Revzen | 1999-04-01 | ||
| 224.0.1.134 | 3Com Discp | Peter White | 1999-04-01 | ||
| 224.0.1.135 | CS-Multicasting | Nedelcho Stanev | 1999-05-01 | ||
| 224.0.1.136 | TS-MC-1 | Darrell Sveistrup | 1999-06-01 | ||
| 224.0.1.137 | Make Source | Anthony Daga | 1999-06-01 | ||
| 224.0.1.138 | Teleborsa | Paolo Strazzera | 1999-06-01 | ||
| 224.0.1.139 | SUMAConfig | Walter Wallach | 1999-07-01 | ||
| 224.0.1.140 | capwap-ac | RFC 5415 | |||
| 224.0.1.141 | DHCP-SERVERS | Eric Hall | 1999-10-01 | ||
| 224.0.1.142 | CN Router-LL | Ian Armitage | 1999-08-01 | ||
| 224.0.1.143 | EMWIN | Antonio Querubin | 2008-02-04 | ||
| 224.0.1.144 | Alchemy Cluster | Stacey O'Rourke; Stacey O'Rourke | 1999-08-01 | ||
| 224.0.1.145 | Satcast One | Julian Nevell | 1999-08-01 | ||
| 224.0.1.146 | Satcast Two | Julian Nevell | 1999-08-01 | ||
| 224.0.1.147 | Satcast Three | Julian Nevell | 1999-08-01 | ||
| 224.0.1.148 | Intline | Robert Sliwinski | 2000-02-01 | ||
| 224.0.1.149 | 8x8 Multicast | Mike Roper | 1999-09-01 | ||
| 224.0.1.150 | Ramp AltitudeCDN MulticastPlus | Giovanni Marzot | Ramp Holdings | 2019-03-13 | |
| 224.0.1.151 | Intline-1 | Robert Sliwinski | 2000-02-01 | ||
| 224.0.1.152 | Intline-2 | Robert Sliwinski | 2000-02-01 | ||
| 224.0.1.153 | Intline-3 | Robert Sliwinski | 2000-02-01 | ||
| 224.0.1.154 | Intline-4 | Robert Sliwinski | 2000-02-01 | ||
| 224.0.1.155 | Intline-5 | Robert Sliwinski | 2000-02-01 | ||
| 224.0.1.156 | Intline-6 | Robert Sliwinski | 2000-02-01 | ||
| 224.0.1.157 | Intline-7 | Robert Sliwinski | 2000-02-01 | ||
| 224.0.1.158 | Intline-8 | Robert Sliwinski | 2000-02-01 | ||
| 224.0.1.159 | Intline-9 | Robert Sliwinski | 2000-02-01 | ||
| 224.0.1.160 | Intline-10 | Robert Sliwinski | 2000-02-01 | ||
| 224.0.1.161 | Intline-11 | Robert Sliwinski | 2000-02-01 | ||
| 224.0.1.162 | Intline-12 | Robert Sliwinski | 2000-02-01 | ||
| 224.0.1.163 | Intline-13 | Robert Sliwinski | 2000-02-01 | ||
| 224.0.1.164 | Intline-14 | Robert Sliwinski | 2000-02-01 | ||
| 224.0.1.165 | Intline-15 | Robert Sliwinski | 2000-02-01 | ||
| 224.0.1.166 | marratech-cc | Peter Parnes | 2000-02-01 | ||
| 224.0.1.167 | EMS-InterDev | Stephen T. Lyda | 2000-02-01 | ||
| 224.0.1.168 | itb301 | Bodo Rueskamp | 2000-03-01 | ||
| 224.0.1.169 | rtv-audio | Chris Adams | 2000-07-01 | ||
| 224.0.1.170 | rtv-video | Chris Adams | 2000-07-01 | ||
| 224.0.1.171 | HAVI-Sim | Stephan Wasserroth | 2000-07-01 | ||
| 224.0.1.172 | Nokia Cluster | Stacey O'Rourke; Stacey O'Rourke | 1999-08-01 | ||
| 224.0.1.173 | host-request | Keith Thompson | 2001-06-01 | ||
| 224.0.1.174 | host-announce | Keith Thompson | 2001-06-01 | ||
| 224.0.1.175 | ptk-cluster | Robert Hodgson | 2001-12-01 | ||
| 224.0.1.176 | Proxim Protocol | Gajendra Shukla | 2002-02-01 | ||
| 224.0.1.177 | Gemtek Systems | Alex Lee | 2002-10-01 | ||
| 224.0.1.178 | IEEE IAPP | Stuart Kerry | 2003-01-01 | ||
| 224.0.1.179 | 1451_Dot5_802_Discovery | Ryon Coleman | 2006-04-11 | ||
| 224.0.1.180 | 1451_Dot5_802_Group_1 | Ryon Coleman | 2006-04-11 | ||
| 224.0.1.181 | 1451_Dot5_802_Group_2 | Ryon Coleman | 2006-04-11 | ||
| 224.0.1.182 | 1451_Dot5_802_Group_3 | Ryon Coleman | 2006-04-11 | ||
| 224.0.1.183 | 1451_Dot5_802_Group_4 | Ryon Coleman | 2006-04-11 | ||
| 224.0.1.184 | VFSDP | Adam Yellen | 2007-03-06 | ||
| 224.0.1.185 | ASAP | RFC 5352 | |||
| 224.0.1.186 | SL-MANET-ROUTERS | RFC 6621 | |||
| 224.0.1.187 | All CoAP Nodes | RFC 7252 | 2013-07-25 | ||
| 224.0.1.188 | BRSDP | Vanya Levy | Semtech Corporation | 2019-02-20 | |
| 224.0.1.189 | Amateur radio DMR | ETSI TS 102 361-3; Jean-Marc MAGNIER | Jean-Marc MAGNIER | 2021-02-08 | |
| 224.0.1.190 | All CoRE Resource Directories | RFC 9176 | 2021-03-16 | ||
| 224.0.1.191-224.0.1.255 | Unassigned |
AD-HOC Block I (224.0.2.0 - 224.0.255.255)
Registration Procedure(s)
- Expert Review, IESG Approval, or Standards Action
Reference
- RFC 5771: IANA Guidelines for IPv4 Multicast Address Assignments
Request an Assignment
https://www.iana.org/protocols/apply
Available Formats
| Address(es) | Description | References | Change Controller | Date Registered | Last Reviewed |
|---|---|---|---|---|---|
| 224.0.2.0 | Unassigned | ||||
| 224.0.2.1 | "rwho" Group (BSD) (unofficial) | Jon Postel | |||
| 224.0.2.2 | SUN RPC PMAPPROC_CALLIT | Brendan Eic | |||
| 224.0.2.3 | EPSON-disc-set | SEIKO EPSON Corp | 2005-01-01 | ||
| 224.0.2.4 | All C1222 Nodes | RFC 6142 | 2009-08-28 | ||
| 224.0.2.5 | Monitoring Discovery Protocol | Alan Robertson | 2012-04-17 | ||
| 224.0.2.6 | BitSend MediaStreams | Carl-Johan Sjöberg | 2012-04-25 | ||
| 224.0.2.7-224.0.2.8 | rxWARN | Caleb Bell | 2012-11-19 | ||
| 224.0.2.9 | DATV streams | Grant Taylor | 2016-10-04 | ||
| 224.0.2.10 | swapapp_multicast | Applykane Technologies Private Limited | 2017-05-19 | ||
| 224.0.2.11 | LDA Discovery Service | Juan Ayas | LDA Audio Tech | 2018-10-17 | |
| 224.0.2.12 | CNP-HD-PLC | Ernst EDER | LonMark International | 2018-11-15 | |
| 224.0.2.13 | BSE | Rami Chalhoub | Beirut Stock Exchange | 2019-01-17 | |
| 224.0.2.14 | OPC Discovery | OPC Foundation | OPC Foundation | 2019-08-19 | |
| 224.0.2.15 | Unassigned | ||||
| 224.0.2.16-224.0.2.17 | unidns | Xie Shao | Xie Shao | 2023-01-18 | |
| 224.0.2.18 | vivoh-directory-1 | Giovanni Marzot | Vivoh | 2023-10-13 | |
| 224.0.2.19 | vivoh-directory-2 | Giovanni Marzot | Vivoh | 2023-10-13 | |
| 224.0.2.20-224.0.2.26 | RGB Spectrum | Lynton Auld | RGB Spectrum | 2024-11-04 | |
| 224.0.2.27 | OSIBYTES/PYBLOX Global Service | Ryan Taylor | 2025-11-13 | ||
| 224.0.2.28-224.0.2.63 | Unassigned | ||||
| 224.0.2.64-224.0.2.95 | Intercontinental Exchange, Inc. | RIR Admin | Intercontinental Exchange, Inc. | 1996-04 | 2007-07 |
| 224.0.2.96-224.0.2.127 | BallisterNet | Tom Ballister | Tom Ballister | 1997-07-01 | 2021-06-11 |
| 224.0.2.128-224.0.2.191 | WOZ-Garage | Douglas Marquardt | 1997-02-01 | ||
| 224.0.2.192-224.0.2.255 | Intercontinental Exchange, Inc. | RIR Admin | Intercontinental Exchange, Inc. | 1997-02-01 | |
| 224.0.3.0-224.0.3.255 | RFE Generic Service | Daniel Steinber | |||
| 224.0.4.0-224.0.4.255 | RFE Individual Conferences | Daniel Steinber | |||
| 224.0.5.0-224.0.5.127 | CDPD Groups | [Bob Brenner] | |||
| 224.0.5.128-224.0.5.191 | Intercontinental Exchange, Inc. | RIR Admin | Intercontinental Exchange, Inc. | 1998-10-01 | |
| 224.0.5.192-224.0.5.255 | Intercontinental Exchange, Inc. | RIR Admin | Intercontinental Exchange, Inc. | 2001-08-01 | |
| 224.0.6.0-224.0.6.127 | Cornell ISIS Project | [Tim Clark] | |||
| 224.0.6.128-224.0.6.143 | MoeSingh | Moe Singh | 2009-09-24 | ||
| 224.0.6.144 | QDNE | Architecture Team | 2018-01-03 | ||
| 224.0.6.145-224.0.6.150 | Unassigned | ||||
| 224.0.6.151 | Canon-Device-control | Hiroshi Okubo | 2014-08-01 | ||
| 224.0.6.152 | NGG-Publishing | Anders Andersen | Nova Goose Global Publishing Group Inc. | 2026-08-20 | |
| 224.0.6.153-224.0.6.191 | Unassigned | ||||
| 224.0.6.192-224.0.6.255 | OneChicago multicast | Brian Trudeau | 2014-09-19 | ||
| 224.0.7.0-224.0.7.255 | Where-Are-You | Bill Simpson | 1994-11-01 | ||
| 224.0.8.0 | Cell Broadcast Encapsulation | Meridian Labs LTD.; LIRNEasia | Meridian Labs LTD.; LIRNEasia | 2017-10-13 | |
| 224.0.8.1-224.0.8.255 | Civic Telemetry | Meridian Labs LTD.; LIRNEasia | Meridian Labs LTD.; LIRNEasia | 2020-10-07 | |
| 224.0.9.0-224.0.9.255 | The Thing System | Carl Malamud | 1998-04-01 | ||
| 224.0.10.0-224.0.10.255 | DLSw Groups | Choon Lee | 1996-04-01 | ||
| 224.0.11.0-224.0.11.255 | NCC.NET Audio | David Rubin | 1996-08-01 | ||
| 224.0.12.0-224.0.12.63 | Microsoft and MSNBC | Tom Blank | 1996-11-01 | ||
| 224.0.12.64-224.0.12.231 | AsiaNext | Lau Wei Lun | Asia Digital Exchange | 2023-03-03 | |
| 224.0.12.136-224.0.12.191 | Unassigned | ||||
| 224.0.12.192-224.0.12.243 | Deribit | Maarten van Malland | Sentillia | 2025-10-10 | |
| 224.0.12.244-224.0.12.255 | Unassigned | ||||
| 224.0.13.0-224.0.13.255 | WorldCom Broadcast Services | Tony Barber | 1997-01-01 | ||
| 224.0.14.0-224.0.14.255 | NLANR | Duane Wessels | 1997-02-01 | ||
| 224.0.15.0-224.0.15.255 | Agilent Technologies | IP Admin | 1997-02-01 | ||
| 224.0.16.0-224.0.16.255 | XingNet | Mika Uusitalo | 1997-04-01 | ||
| 224.0.17.0-224.0.17.31 | Mercantile & Commodity Exchange | Asad Gilani | 1997-07-01 | ||
| 224.0.17.32-224.0.17.63 | NDQMD1 | Michael Rosenberg | Nasdaq Inc. | 1999-03-01 | |
| 224.0.17.64-224.0.17.127 | ODN-DTV | Richard Hodges | 1999-03-01 | ||
| 224.0.17.128-224.0.17.255 | Unassigned | ||||
| 224.0.18.0-224.0.18.255 | Dow Jones | Wenjie Peng | 1997-01-01 | ||
| 224.0.19.0-224.0.19.63 | Walt Disney Company | Scott Watson | 1997-08-01 | ||
| 224.0.19.64-224.0.19.95 | Cal Multicast | Ed Moran | 1997-10-01 | ||
| 224.0.19.96-224.0.19.127 | Intercontinental Exchange, Inc. | RIR Admin | Intercontinental Exchange, Inc. | 1997-10 | 2007-07 |
| 224.0.19.128-224.0.19.191 | IIG Multicast | Wayne Carr | 1997-12-01 | ||
| 224.0.19.192-224.0.19.207 | Metropol | James Crawford | 1998-05-01 | ||
| 224.0.19.208-224.0.19.239 | Xenoscience, Inc. | Mary Timm | 1998-07-01 | ||
| 224.0.19.240-224.0.19.255 | MJDPM | Matthew Straight | 2007-03-01 | ||
| 224.0.20.0-224.0.20.63 | MS-IP/TV | Tony Wong | 1998-07-01 | ||
| 224.0.20.64-224.0.20.127 | Reliable Network Solutions | Werner Vogels | 1998-08-01 | ||
| 224.0.20.128-224.0.20.143 | TRACKTICKER Group | Alan Novick | 1998-08-01 | ||
| 224.0.20.144-224.0.20.207 | CNR Rebroadcast MCA | Robert Sautter | 1999-08-01 | ||
| 224.0.20.208-224.0.20.211 | CIX Trading | Darren Molloy | CIX Trading | 2025-09-18 | |
| 224.0.20.212-224.0.20.255 | Unassigned | ||||
| 224.0.21.0-224.0.21.127 | Talarian MCAST | Geoff Mendal | 1999-01-01 | ||
| 224.0.21.128-224.0.21.255 | Unassigned | ||||
| 224.0.22.0-224.0.22.239 | WORLD MCAST | Ian Stewart | 1999-06-01 | ||
| 224.0.22.240-224.0.22.255 | Jones International | Jim Ginsburg | 2007-10-31 | ||
| 224.0.23.0 | ECHONET | Takeshi Saito | 2003-02-01 | ||
| 224.0.23.1 | Ricoh-device-ctrl | Akihiro Nishida | 2003-02-01 | ||
| 224.0.23.2 | Ricoh-device-ctrl | Akihiro Nishida | 2003-02-01 | ||
| 224.0.23.3-224.0.23.10 | Telefeed | Wally Beddoe | 2003-04-01 | ||
| 224.0.23.11 | SpectraTalk | Madhav Karhade | 2003-05-01 | ||
| 224.0.23.12 | KNXnet/IP | Joost Demarest | KNX Association | 2003-07-01 | 2023-08-23 |
| 224.0.23.13 | TVE-ANNOUNCE2 | Michael Dolan | 2003-10-01 | ||
| 224.0.23.14 | DvbServDisc | Bert van Willigen | 2004-01-01 | ||
| 224.0.23.15-224.0.23.31 | MJDPM | Matthew Straight | 2007-03-01 | ||
| 224.0.23.32 | Norman MCMP | Kristian A. Bognaes | 2004-02-01 | ||
| 224.0.23.33 | RRDP | Tetsuo Hoshi | 2004-06-01 | ||
| 224.0.23.34 | AF_NA | Bob Brzezinski | 2005-10-28 | ||
| 224.0.23.35 | AF_OPRA_NBBO | Bob Brzezinski | 2005-10-28 | ||
| 224.0.23.36 | AF_OPRA_FULL | Bob Brzezinski | 2005-10-28 | ||
| 224.0.23.37 | AF_NEWS | Bob Brzezinski | 2005-10-28 | ||
| 224.0.23.38 | AF_NA_CHI | Bob Brzezinski | 2005-10-28 | ||
| 224.0.23.39 | AF_OPRA_NBBO_CHI | Bob Brzezinski | 2005-10-28 | ||
| 224.0.23.40 | AF_OPRA_FULL_CHI | Bob Brzezinski | 2005-10-28 | ||
| 224.0.23.41 | AF_NEWS_CHI | Bob Brzezinski | 2005-10-28 | ||
| 224.0.23.42 | Control for IP Video | Nadine Guillaume | 2005-02-01 | ||
| 224.0.23.43 | acp-discovery | Andy Belk | 2005-02-01 | ||
| 224.0.23.44 | acp-management | Andy Belk | 2005-02-01 | ||
| 224.0.23.45 | acp-data | Andy Belk | 2005-02-01 | ||
| 224.0.23.46 | dof-multicast | Bryant Eastham | 2006-06-16 | 2015-04-23 | |
| 224.0.23.47 | AF_DOB_CHI | Bob Brzezinski | 2005-10-28 | ||
| 224.0.23.48 | AF_OPRA_FULL2_CHI | Bob Brzezinski | 2005-10-28 | ||
| 224.0.23.49 | AF_DOB | Bob Brzezinski | 2005-10-28 | ||
| 224.0.23.50 | AF_OPRA_FULL2 | Bob Brzezinski | 2005-10-28 | ||
| 224.0.23.51 | Fairview | Jim Lyle | 2006-08-07 | ||
| 224.0.23.52 | Intercontinental Exchange, Inc. | RIR Admin | Intercontinental Exchange, Inc. | 2006-08-11 | |
| 224.0.23.53 | MCP | Tim DeBaillie | 2006-11-30 | ||
| 224.0.23.54 | ServDiscovery | Paul Langille | 2007-01-17 | ||
| 224.0.23.55 | noaaport1 | Antonio Querubin | 2008-02-04 | ||
| 224.0.23.56 | noaaport2 | Antonio Querubin | 2008-02-04 | ||
| 224.0.23.57 | noaaport3 | Antonio Querubin | 2008-02-04 | ||
| 224.0.23.58 | noaaport4 | Antonio Querubin | 2008-02-04 | ||
| 224.0.23.59 | DigacIP7 | Jonathan Niedfeldt | 2008-02-22 | ||
| 224.0.23.60 | AtscSvcSig | Jerry Whitaker | 2008-12-19 | ||
| 224.0.23.61 | SafetyNET p (potentially IGMPv1) | Pilz GmbH and Co. KG | 2009-03-13 | ||
| 224.0.23.62 | BluemoonGamesMC | Christopher Mettin | 2009-05-12 | ||
| 224.0.23.63 | iADT Discovery | Paul Suhler | 2009-05-12 | ||
| 224.0.23.64-224.0.23.80 | Moneyline | Guido Petronio | 2004-01-01 | ||
| 224.0.23.81-224.0.23.127 | Reserved (Moneyline) | ||||
| 224.0.23.128-224.0.23.157 | PHLX | Michael Rosenberg | Nasdaq Inc. | 2004-01-01 | |
| 224.0.23.158 | VSCP | Charles Tewiah | 2005-09-01 | ||
| 224.0.23.159 | LXI-EVENT | Nick Barendt | 2005-11-04 | ||
| 224.0.23.160 | solera_lmca | Mark Armstrong | 2006-02-09 | ||
| 224.0.23.161 | VBooster | Alexander Pevzner | 2006-03-17 | ||
| 224.0.23.162 | cajo discovery | John Catherino | 2006-03-17 | ||
| 224.0.23.163 | INTELLIDEN | Jeff Schenk | 2006-03-31 | ||
| 224.0.23.164 | IceEDCP | Oliver Lewis | 2006-07-11 | ||
| 224.0.23.165 | omasg | Mark Lipford | 2006-07-11 | ||
| 224.0.23.166 | MEDIASTREAM | Maurice Robberson | 2006-08-15 | ||
| 224.0.23.167 | Systech Mcast | Dan Jakubiec | 2006-08-21 | ||
| 224.0.23.168 | tricon-system-management | John Gabler | 2007-07-06 | ||
| 224.0.23.169 | MNET discovery | Andy Crick | 2008-01-14 | ||
| 224.0.23.170 | CCNx (not for global routing) | Simon Barber | 2009-09-24 | ||
| 224.0.23.171 | LLAFP | Michael Lyle | 2009-11-11 | ||
| 224.0.23.172 | UFMP | Shachar Dor | Mellanox Technologies, Inc. | 2010-02-04 | |
| 224.0.23.173 | PHILIPS-HEALTH | Mike King | Philips Healthcare | 2010-02-26 | |
| 224.0.23.174 | PHILIPS-HEALTH | Mike King | Philips Healthcare | 2010-02-26 | |
| 224.0.23.175 | QDP | Kevin Gross | 2010-03-12 | ||
| 224.0.23.176 | CalAmp WCP | Pierre Oliver | 2011-06-06 | ||
| 224.0.23.177 | AES discovery | Kevin Gross | 2012-08-28 | ||
| 224.0.23.178 | JDP Java Discovery Protocol | Florian Weimer | 2013-02-08 | ||
| 224.0.23.179 | PixelPusher | Jasmine Strong | 2014-06-04 | ||
| 224.0.23.180 | network metronome | George Neville-Neil | 2014-12-17 | ||
| 224.0.23.181 | polaris-video-transport | Geoff Golder | 2016-04-19 | ||
| 224.0.23.182 | AMI-DISCOVERY | Dmitri Kisten | Alcorn McBride, Inc. | 2025-12-01 | |
| 224.0.23.183-224.0.23.191 | Unassigned | ||||
| 224.0.23.192-224.0.23.255 | PINKOTC | Sergey Shulgin | 2008-08-12 | ||
| 224.0.24.0-224.0.24.127 | AGSC UK VVs | Andrew Rowley | 2006-06-09 | ||
| 224.0.24.128-224.0.24.255 | EM-MULTI | Soren Martin Sorensen | 2006-08-07 | ||
| 224.0.25.0-224.0.28.255 | CME Market Data | Anthony Lopresti | CME Group | 2007-03-22 | |
| 224.0.29.0-224.0.30.255 | Deutsche Boerse | Jan Drwal | 2007-03-22 | ||
| 224.0.31.0-224.0.34.255 | CME Market Data | Anthony Lopresti | CME Group | 2007-07-17 | |
| 224.0.35.0-224.0.35.255 | M2S | Itamar Gilad | 2007-08-31 | ||
| 224.0.36.0-224.0.36.255 | DigiPlay | Robert Taylor | 2016-09-29 | ||
| 224.0.37.0-224.0.38.255 | London Metal Exchange | LME Networks | London Metal Exchange | 2017-03-24 | |
| 224.0.39.0-224.0.40.255 | CDAS | Oyvind H. Olsen | 2007-09-12 | ||
| 224.0.41.0-224.0.41.255 | Intercontinental Exchange, Inc. | RIR Admin | Intercontinental Exchange, Inc. | 2007-11-28 | 2011-02-15 |
| 224.0.42.0-224.0.45.255 | Media Systems | Media Systems OOO | Media Systems OOO | 2008-01-15 | |
| 224.0.46.0-224.0.50.255 | Deutsche Boerse | Jan Drwal | 2008-01-25 | ||
| 224.0.51.0-224.0.51.255 | ALCOM-IPTV | TV System Administrators | Ålands Telekommunikation Ab | 2008-04-09 | 2018-02-20 |
| 224.0.52.0-224.0.53.255 | Euronext | Euronext Admin | Euronext Admin | 2008-07-23 | 2014-11-24 |
| 224.0.54.0-224.0.57.255 | Telia Norway mcast | Henrik Lans | Telia-Norway-Get-NOC | 2008-08-20 | |
| 224.0.58.0-224.0.61.255 | Intercontinental Exchange, Inc. | RIR Admin | Intercontinental Exchange, Inc. | 2008-08-27 | |
| 224.0.62.0-224.0.62.255 | BATS | Cboe POC | Cboe Bats, LLC | 2008-12-24 | |
| 224.0.63.0-224.0.63.255 | BATS Trading | Cboe POC | Cboe Bats, LLC | 2009-03-13 | |
| 224.0.64.0-224.0.67.255 | Euronext | Euronext Admin | Euronext Admin | 2009-03-13 | 2014-11-24 |
| 224.0.68.0-224.0.69.255 | Nasdaq Inc. | Michael Rosenberg | Nasdaq Inc. | 2009-05-12 | |
| 224.0.70.0-224.0.71.255 | Intercontinental Exchange, Inc. | RIR Admin | Intercontinental Exchange, Inc. | 2009-06-16 | 2011-03-01 |
| 224.0.72.0-224.0.72.255 | TMX | TMX Network Engineering | TMX | 2009-08-28 | |
| 224.0.73.0-224.0.74.255 | Direct Edge | Cboe POC | Cboe Bats, LLC | 2009-08-28 | |
| 224.0.75.0-224.0.75.255 | Nasdaq Inc. | Michael Rosenberg | Nasdaq Inc. | 2010-01-22 | |
| 224.0.76.0-224.0.76.255 | Intercontinental Exchange, Inc. | RIR Admin | Intercontinental Exchange, Inc. | 2010-02-26 | 2011-03-01 |
| 224.0.77.0-224.0.77.255 | Intercontinental Exchange, Inc. | RIR Admin | Intercontinental Exchange, Inc. | 2010-02-26 | |
| 224.0.78.0-224.0.78.255 | ALCOM-IPTV | TV System Administrators | Ålands Telekommunikation Ab | 2010-03-12 | 2018-02-20 |
| 224.0.79.0-224.0.81.255 | Nasdaq Inc. | Michael Rosenberg | Nasdaq Inc. | 2010-08-24 | |
| 224.0.82.0-224.0.85.255 | BATS Trading | Cboe POC | Cboe Bats, LLC | 2011-01-31 | |
| 224.0.86.0-224.0.101.255 | Intercontinental Exchange, Inc. | RIR Admin | Intercontinental Exchange, Inc. | 2011-02-10 | |
| 224.0.102.0-224.0.102.127 | Intercontinental Exchange, Inc. | RIR Admin | Intercontinental Exchange, Inc. | 2011-04-13 | |
| 224.0.102.128-224.0.102.255 | MVS-IPTV-2 | Midwest Video Solutions | Midwest Video Solutions | 2014-06-12 | |
| 224.0.103.0-224.0.104.255 | MVS-IPTV | Midwest Video Solutions; Adam DeMinter | Midwest Video Solutions | 2011-04-20 | |
| 224.0.105.0-224.0.105.127 | MIAX Multicast | Gamini Karunaratne | Miami International Security Exchange | 2011-06-06 | |
| 224.0.105.128-224.0.105.255 | MVS-IPTV3 | Justin Beaman | Midwest Video Solutions | 2017-12-04 | |
| 224.0.106.0-224.0.106.255 | TMX | TMX Network Engineering | TMX | 2011-06-16 | |
| 224.0.107.0-224.0.108.255 | TSX Inc. | TMX Network Engineering | TMX | 2011-07-13 | |
| 224.0.109.0-224.0.110.255 | TSX Inc. | TMX Network Engineering | TMX | 2011-10-25 | |
| 224.0.111.0-224.0.111.255 | VoleraDataFeed | Cboe POC | Cboe Bats, LLC | 2011-10-25 | |
| 224.0.112.0-224.0.112.255 | JHB-STOCK-EXCH | Clem Verwey | 2011-12-07 | ||
| 224.0.113.0-224.0.114.255 | Deutsche Boerse | Jan Drwal | 2011-12-19 | ||
| 224.0.115.0-224.0.115.255 | TMX | TMX Network Engineering | TMX | 2012-06-12 | |
| 224.0.116.0-224.0.116.255 | Intercontinental Exchange, Inc | RIR Admin | Intercontinental Exchange, Inc. | 2012-06-19 | |
| 224.0.117.0-224.0.119.255 | Nasdaq Inc. | Michael Rosenberg | Nasdaq Inc. | 2012-07-12 | |
| 224.0.120.0-224.0.120.255 | czechbone iptv | Karel Vesely | Nej.cz s.r.o. | 2013-01-15 | |
| 224.0.121.0-224.0.121.255 | AQUIS-EXCHANGE | Paul Roberts | Aquis Exchange PLC | 2013-05-13 | |
| 224.0.122.0-224.0.123.255 | DNS:NET TV | Marlon Berlin | 2013-05-25 | ||
| 224.0.124.0-224.0.124.255 | Boston Options Exchange | David Wilson; Michael Caravetta | 2013-05-30 | ||
| 224.0.125.0-224.0.125.255 | Hanweck Associates | Cboe POC | Cboe Bats, LLC | 2013-09-05 | |
| 224.0.126.0-224.0.129.255 | Intercontinental Exchange, Inc. | RIR Admin | Intercontinental Exchange, Inc. | 2013-10-31 | |
| 224.0.130.0-224.0.131.255 | BATS Trading | Cboe POC | Cboe Bats, LLC | 2014-03-05 | |
| 224.0.132.0-224.0.135.255 | Net By Net Holding IPTV | Lev V. Cherednikov | 2014-04-12 | ||
| 224.0.136.0-224.0.139.255 | Aequitas Innovations Inc. | Cboe POC | Cboe Bats, LLC | 2014-05-16 | |
| 224.0.140.0-224.0.140.255 | Instinet | Instinet | Instinet | 2014-09-04 | |
| 224.0.141.0-224.0.141.255 | MIAX-2 | Gamini Karunaratne | Miami International Security Exchange | 2015-06-30 | |
| 224.0.142.0-224.0.142.255 | MIAX M3 | Gamini Karunaratne | Miami International Security Exchange | 2017-05-19 | |
| 224.0.143.0-224.0.143.255 | A2X-EXCHANGE | Neal Lawrence | 2017-06-02 | ||
| 224.0.144.0-224.0.151.255 | VZ-Multicast-Public | Stephen Ray Middleton | 2015-03-23 | ||
| 224.0.152.0-224.0.152.255 | cse-md | David Brett | 2016-04-19 | ||
| 224.0.153.0-224.0.156.255 | Telia Norway mcast | Henrik Lans | Telia-Norway-Get-NOC | 2016-05-24 | |
| 224.0.157.0-224.0.157.255 | London Metal Exchange | LME Networks | London Metal Exchange | 2017-01-23 | |
| 224.0.158.0-224.0.159.255 | TriAct Canada Marketplace LP | Hatice Unal | 2017-01-23 | ||
| 224.0.160.0-224.0.165.255 | Deutsche Boerse | Bernd Uphoff | 2016-07-07 | ||
| 224.0.166.0-224.0.167.255 | Virgin Connect IPTV | Vladimir Shishkov | 2017-02-17 | ||
| 224.0.168.0-224.0.169.255 | Deutsche Boerse | Bernd Uphoff | 2017-12-05 | ||
| 224.0.170.0-224.0.170.255 | MVS-IPTV4 | Justin Beaman | Midwest Video Solutions | 2018-06-07 | |
| 224.0.171.0-224.0.171.255 | COINBASE-MARKETS | Gavin McKee | Coinbase | 2019-01-25 | |
| 224.0.172.0-224.0.175.255 | Deutsche Boerse | Bernd Uphoff | 2018-06-19 | ||
| 224.0.176.0-224.0.179.255 | MIAX-EX-3-4-5 | Gamini Karunaratne | Miami International Security Exchange | 2018-07-31 | |
| 224.0.180.0-224.0.181.255 | CBOE Europe | Cboe POC | Cboe Bats, LLC | 2019-02-13 | |
| 224.0.182.0-224.0.183.255 | ALCOM-TV | TV System Administrators | Ålands Telekommunikation Ab | 2019-02-28 | |
| 224.0.184.0-224.0.184.255 | AQUIS-EXCHANGE | Paul Roberts | Aquis Exchange PLC | 2019-08-28 | |
| 224.0.185.0-224.0.185.255 | Hanweck Associates | Cboe POC | Cboe Bats, LLC | 2019-09-12 | |
| 224.0.186.0-224.0.186.255 | BOX Options Market | Alexandre Gomes | BOX TECHNOLOGY CANADA INC. | 2019-10-02 | |
| 224.0.187.0-224.0.188.255 | MVS-IPTV5 | Justin Beaman | Midwest Video Solutions | 2019-11-13 | |
| 224.0.189.0-224.0.189.255 | Ido Rosen | Ido Rosen | Ido Rosen | 2021-03-23 | |
| 224.0.190.0-224.0.191.255 | RTP Media | Vadim B. Kantor | RTP Media | 2020-10-01 | |
| 224.0.192.0-224.0.207.255 | Intercontinental Exchange, Inc. | RIR Admin | Intercontinental Exchange, Inc. | 2021-04-01 | |
| 224.0.208.0-224.0.213.255 | Euronext | Euronext Admin | Euronext Admin | 2021-04-13 | |
| 224.0.214.0-224.0.214.255 | OSK B2B mVPN distribution | Attila Miklóš | IPadmin - Orange Slovensko a.s. | 2021-06-11 | |
| 224.0.215.0-224.0.215.255 | Tradeweb CLOB | Ruben Hernandez | Tradeweb Markets Inc | 2022-01-06 | |
| 224.0.216.0-224.0.219.255 | RTP Media | Vadim B. Kantor | RTP Media | 2021-07-30 | |
| 224.0.220.0-224.0.223.255 | Japan Exchange Group | Japan Exchange Group | Japan Exchange Group | 2021-09-07 | |
| 224.0.224.0-224.0.224.255 | AQUIS-EXCHANGE | Paul Roberts | Aquis Exchange PLC | 2021-12-21 | |
| 224.0.225.0-224.0.225.255 | Kalejdo TV | Kalejdo TV | Thomas Sörlin | 2022-08-26 | |
| 224.0.226.0-224.0.227.255 | MVS-IPTV6 | Justin Beaman | Midwest Video Solutions | 2022-06-09 | |
| 224.0.228.0-224.0.231.255 | London Metal Exchange | LME Networks | London Metal Exchange | 2022-02-01 | |
| 224.0.232.0-224.0.239.255 | Lucera Financial Infra | Kevin McNicholas | Lucera Financial Infrastructures | 2022-02-17 | |
| 224.0.240.0-224.0.243.255 | London Metal Exchange | LME Networks | London Metal Exchange | 2022-05-26 | |
| 224.0.244.0-224.0.244.255 | Clearpool AMS | Charles Gomes | Clearpool | 2023-05-19 | |
| 224.0.245.0-224.0.245.255 | OneChronos | Kelly Littlepage | OCX Group Inc | 2023-08-29 | |
| 224.0.246.0-224.0.246.255 | MEMX Memoir | Javier Torres | Members Exchange (MEMX) | 2024-01-22 | |
| 224.0.247.0-224.0.247.255 | BOX Options Market | Alexandre Gomes | BOX TECHNOLOGY CANADA INC. | 2024-02-27 | |
| 224.0.248.0-224.0.249.255 | MEMX Memoir | Muhammad Mazhar Cheema | Members Exchange (MEMX) | 2025-12-03 | |
| 224.0.250.0-224.0.251.255 | KPN Broadcast Services | Ad C. Spelt; KPN IP Office | 2009-09-01 | ||
| 224.0.252.0-224.0.252.255 | KPN Broadcast Services | Ad C. Spelt; KPN IP Office | 2005-08-01 | ||
| 224.0.253.0-224.0.253.255 | KPN Broadcast Services | Ad C. Spelt; KPN IP Office | 2005-08-01 | ||
| 224.0.254.0-224.0.254.255 | Intelsat IPTV | Karl Elad | 2006-03-31 | 2011-02-22 | |
| 224.0.255.0-224.0.255.255 | Intelsat IPTV | Karl Elad | 2006-03-31 | 2011-02-22 |
RESERVED (224.1.0.0-224.1.255.255 (224.1/16))
Reference
- RFC 5771: IANA Guidelines for IPv4 Multicast Address Assignments
Note
No new assignments are being made in this range for the time being.
Available Formats
| Address(es) | Description | References | Change Controller | Date Registered | Last Reviewed |
|---|---|---|---|---|---|
| 224.1.0.0-224.1.0.37 | Reserved | RFC 5771 | |||
| 224.1.0.38 | dantz | Richard Zulch | 2004-05-01 | ||
| 224.1.0.39-224.1.1.255 | Reserved | RFC 5771 | |||
| 224.1.2.0-224.1.2.255 | Intercontinental Exchange, Inc. | RIR Admin | Intercontinental Exchange, Inc. | 2006-02-17 | |
| 224.1.3.0-224.1.4.255 | NOB Cross media facilities | Technicolor NL NOC | 2006-05-22 | ||
| 224.1.5.0-224.1.255.255 | Reserved | RFC 5771 |
SDP/SAP Block (224.2.0.0-224.2.255.255 (224.2/16))
Reference
- RFC 5771: IANA Guidelines for IPv4 Multicast Address Assignments
Available Formats
| Address(es) | Description | References | Change Controller | Date Registered | Last Reviewed |
|---|---|---|---|---|---|
| 224.2.0.0-224.2.127.253 | Multimedia Conference Calls | Steve Casner | |||
| 224.2.127.254 | SAPv1 Announcements | Steve Casner | |||
| 224.2.127.255 | SAPv0 Announcements (deprecated) | Steve Casner | |||
| 224.2.128.0-224.2.255.255 | SAP Dynamic Assignments | Steve Casner |
AD-HOC Block II (224.3.0.0-224.4.255.255 (224.3/16, 224.4/16))
Registration Procedure(s)
- Expert Review, IESG Approval, or Standards Action
Reference
- RFC 5771: IANA Guidelines for IPv4 Multicast Address Assignments
Request an Assignment
https://www.iana.org/protocols/apply
Available Formats
| Address(es) | Description | References | Change Controller | Date Registered | Last Reviewed |
|---|---|---|---|---|---|
| 224.3.0.0-224.3.0.63 | Nasdaqmdfeeds (re-new/March 2003) | Michael Rosenberg | Nasdaq Inc. | 1999-03-01 | |
| 224.3.0.64-224.3.255.255 | Unassigned | ||||
| 224.4.0.0-224.4.0.255 | London Stock Exchange Group | Andrew Padley | London Stock Exchange Group | 2006-03-31 | |
| 224.4.1.0-224.4.1.255 | London Stock Exchange Group | Andrew Padley | London Stock Exchange Group | 2008-02-25 | |
| 224.4.2.0-224.4.2.255 | London Stock Exchange Group | Andrew Padley | London Stock Exchange Group | 2008-02-29 | |
| 224.4.3.0-224.4.4.255 | London Stock Exchange Group | Andrew Padley | London Stock Exchange Group | 2008-12-24 | |
| 224.4.5.0-224.4.6.255 | London Stock Exchange Group | Andrew Padley | London Stock Exchange Group | 2009-05-12 | |
| 224.4.7.0-224.4.7.255 | CBOE Holdings | Cboe POC | Cboe Bats, LLC | 2012-04-10 | |
| 224.4.8.0-224.4.9.255 | Nasdaq Inc. | Michael Rosenberg | Nasdaq Inc. | 2012-04-11 | |
| 224.4.10.0-224.4.13.255 | London Stock Exchange Group | Andrew Padley | London Stock Exchange Group | 2012-04-11 | |
| 224.4.14.0-224.4.17.255 | London Stock Exchange Group | Andrew Padley | London Stock Exchange Group | 2018-01-04 | |
| 224.4.18.0-224.4.21.255 | London Stock Exchange Group | Andrew Padley | London Stock Exchange Group | 2021-02-04 | |
| 224.4.22.0-224.4.23.255 | London Stock Exchange Group | Andrew Padley | London Stock Exchange Group | 2021-09-21 | |
| 224.4.24.0-224.4.31.255 | Fenics Market Data | Steve Loizou | Cantor Fitzgerald | 2023-01-18 | |
| 224.4.32.0-224.4.33.255 | Global Futures & Options Ltd | David Beattie | Global Futures and Options Limited | 2023-03-15 | |
| 224.4.34.0-224.4.39.255 | MIAX-3 | Gamini Karunaratne | Miami International Security Exchange | 2023-05-24 | |
| 224.4.40.0-224.4.43.255 | Japan Exchange Group | Japan Exchange Group/Osaka Exchange, Inc. | Japan Exchange Group/Osaka Exchange, Inc. | 2024-06-25 | |
| 224.4.44.0-224.4.47.255 | CME Group | Anthony Lopresti | CME Group | 2024-08-02 | |
| 224.4.48.0-224.4.63.255 | Intercontinental Exchange, Inc. | RIR Admin | Intercontinental Exchange, Inc. | 2023-04-10 | |
| 224.4.64.0-224.4.71.255 | CME Group | Anthony Lopresti | CME Group | 2024-08-06 | |
| 224.4.72.0-224.4.79.255 | FMX Market Data | Steve Loizou | BCG Group | 2025-02-25 | |
| 224.4.80.0-224.4.84.255 | CBOE Holdings | Cboe POC | Cboe Bats, LLC | 2025-04-01 | |
| 224.4.85.0-224.4.85.255 | A5X - Market Data Feed | Cleverson Arashiro | A5X | 2026-01-27 | |
| 224.4.86.0-224.4.86.255 | EuroCTP BV | Pico Network Engineering | Pico | 2026-03-10 | |
| 224.4.87.0-224.4.87.255 | Unassigned | ||||
| 224.4.88.0-224.4.95.255 | CME Group | Anthony Lopresti | CME Group | 2025-12-03 | |
| 224.4.96.0-224.4.103.255 | LUME_Markets | Kevin McNicholas | Lucera Financial Infrastructures | 2026-06-26 | |
| 224.4.104.0-224.4.255.255 | Unassigned |
RESERVED (224.5.0.0-224.251.255.255 (251 /16s))
Reference
- RFC 5771: IANA Guidelines for IPv4 Multicast Address Assignments
Available Formats
| Address(es) | Description | References | Change Controller | Date Registered | Last Reviewed |
|---|---|---|---|---|---|
| 224.5.0.0-224.251.255.255 | Reserved | RFC 5771 |
DIS Transient Groups 224.252.0.0-224.255.255.255 (224.252/14))
Reference
- RFC 2365: Administratively Scoped IP Multicast
Available Formats
RESERVED (225.0.0.0-231.255.255.255 (7 /8s))
Reference
- RFC 5771: IANA Guidelines for IPv4 Multicast Address Assignments
Available Formats
| Address(es) | Description | References | Change Controller | Date Registered | Last Reviewed |
|---|---|---|---|---|---|
| 225.0.0.0-231.255.255.255 | Reserved | RFC 5771 |
Source-Specific Multicast Block (232.0.0.0-232.255.255.255 (232/8))
Reference
- RFC 5771: IANA Guidelines for IPv4 Multicast Address Assignments
Note
Addresses within the 232.0.1.0-232.255.255.255 are dynamically allocated by hosts when needed RFC 4607
Available Formats
GLOP Block
Reference
- RFC 3180: GLOP Addressing in 233/8
Available Formats
| Address(es) | Description | References | Change Controller | Date Registered | Last Reviewed |
|---|---|---|---|---|---|
| 233.0.0.0-233.251.255.255 | GLOP Block | RFC 3180 |
AD-HOC Block III (233.252.0.0-233.255.255.255 (233.252/14))
Registration Procedure(s)
- Expert Review, IESG Approval, or Standards Action
Reference
- RFC 5771: IANA Guidelines for IPv4 Multicast Address Assignments
Request an Assignment
https://www.iana.org/protocols/apply
Available Formats
| Address(es) | Description | References | Change Controller | Date Registered | Last Reviewed |
|---|---|---|---|---|---|
| 233.252.0.0-233.252.0.255 | MCAST-TEST-NET | IANA; RFC 5771; RFC 6676 | 2010-01-20 | 2010-01-20 | |
| 233.252.1.0-233.252.1.255 | Pico | Pico Sales | Pico | 2010-08-12 | |
| 233.252.2.0-233.252.7.255 | Tradition | Tradition Network Operations and Command Center | 2010-08-12 | ||
| 233.252.8.0-233.252.11.255 | BVMF_MKT_DATA | Roberto Costa Simoes | 2010-08-12 | ||
| 233.252.12.0-233.252.13.255 | blizznet-tv-services | Paul Wallner | 2010-09-14 | ||
| 233.252.14.0-233.252.17.255 | BVMF_MKT_DATA_2 | Guilherme Longanezi | 2016-09-27 | ||
| 233.252.18.0-233.252.18.255 | Pico | Pico Sales | Pico | 2021-12-17 | |
| 233.252.19.0-233.255.255.255 | Unassigned |
Unicast-Prefix-based IPv4 Multicast Addresses
Reference
- RFC 6034: Unicast-Prefix-Based IPv4 Multicast Addresses
Available Formats
| Address(es) | Description | References | Change Controller | Date Registered | Last Reviewed |
|---|---|---|---|---|---|
| 234.0.0.0-234.255.255.255 | Unicast-Prefix-based IPv4 Multicast Addresses | RFC 6034 | 2010-08-11 |
Scoped Multicast Ranges
Reference
- RFC 5771: IANA Guidelines for IPv4 Multicast Address Assignments
Available Formats
| Address(es) | Description | References | Change Controller | Date Registered | Last Reviewed |
|---|---|---|---|---|---|
| 235.0.0.0-238.255.255.255 | Reserved | RFC 5771 | |||
| 239.0.0.0-239.255.255.255 | Organization-Local Scope | David Meyer; RFC 2365 | 1997-01-01 |
Relative Addresses used with Scoped Multicast Addresses
Reference
- RFC 5771: IANA Guidelines for IPv4 Multicast Address Assignments
Note
(*) It is only appropriate to use these values in explicitly- configured experiments; they MUST NOT be shipped as defaults in implementations. See RFC 3692 for details.
These addresses are listed in the Domain Name Service under MCAST.NET and 224.IN-ADDR.ARPA.
Note that when used on an Ethernet or IEEE 802 network, the 23 low-order bits of the IP Multicast address are placed in the low-order 23 bits of the Ethernet or IEEE 802 net multicast address 1.0.94.0.0.0. See the section on "IANA ETHERNET ADDRESS BLOCK".
Available Formats
| Address(es) | Description | References | Change Controller | Date Registered | Last Reviewed |
|---|---|---|---|---|---|
| 0 | SAP Session Announcement Protocol | Mark Handley | 1998-12-01 | ||
| 1 | MADCAP Protocol | RFC 2730 | |||
| 2 | SLPv2 Discovery | Erik Guttman | 2001-12-01 | ||
| 3 | MZAP | Dave Thaler | 2000-06-01 | ||
| 4 | Multicast Discovery of DNS Services | Bill Manning | 1999-08-01 | ||
| 5 | SSDP | UPnP Forum | 2006-06-27 | ||
| 6 | DHCP v4 | Eric Hall | 1999-10-01 | ||
| 7 | AAP | Stephen Hanna | 2000-07-01 | ||
| 8 | MBUS | RFC 3259 | |||
| 9 | UPnP | UPnP Forum | 2006-06-27 | ||
| 10 | MCAST-TEST-NET-2 | RFC 6676 | |||
| 11-252 | Unassigned | ||||
| 253 | Reserved | ||||
| 254 | RFC3692-style Experiment (*) | RFC 4727 | |||
| 255 | Unassigned |
Contact Information
| Name | Organization | Contact URI | Last Updated |
|---|---|---|---|
| 3GPP | https://www.3gpp.org | ||
| A5X | platform-engineering&a5x.com.br | 2026-01-27 | |
| Ad C. Spelt | a.c.spelt&kpn.com | 2009-09-01 | |
| Adam DeMinter | adam.deminter&mwt.net | 2011-04-20 | |
| Adam Yellen | adam&videofurnace.com | 2009-08-12 | |
| Akihiro Nishida | nishida&src.ricoh.co.jp | 2003-02-01 | |
| Alan Novick | anovick&tdc.com | 1998-08-01 | |
| Alan Robertson | alanr&unix.sh | 2012-04-17 | |
| Ålands Telekommunikation Ab | tv-noc&alcom.ax | 2019-02-28 | |
| Alcorn McBride, Inc. | eng&alcorn.com | 2025-12-01 | |
| Alex Lee | alex_mrlee&gemtek.com.tw | 2002-10-01 | |
| Alexander Pevzner | pzz&pzz.msk.ru | 2006-03-17 | |
| Alexandre Gomes | agomes&boxtechnology.com | 2024-02-27 | |
| Anders Andersen | njDQE2023&163.com | 2026-08-20 | |
| Andrew Cherenson | arc&sgi.com | ||
| Andrew Padley | London Stock Exchange Group | andrew.padley&lseg.com | 2025-09-08 |
| Andrew Rowley | Andrew.Rowley&manchester.ac.uk | 2006-06-09 | |
| Andy Belk | register1&azulsystems.com | 2005-02-01 | |
| Andy Crick | acrick&haascnc.com | 2008-01-14 | |
| Anthony Daga | anthony&mksrc.com | 1999-06-01 | |
| Anthony Lopresti | CME Group | anthony.lopresti&cmegroup.com | 2025-12-03 |
| Antonio Querubin | tony&lava.net | 2008-02-04 | |
| Applykane Technologies Private Limited | applykane&gmail.com | 2017-05-19 | |
| Aquis Exchange PLC | networks&aquis.eu | 2021-12-21 | |
| Architecture Team | tech.arch&quantifytechnology.com | 2018-01-31 | |
| Arnoud Zwemmer | arnoud&nwn.nl | 1996-11-01 | |
| Asad Gilani | agilani&nymex.com | 1997-07-01 | |
| Asia Digital Exchange | it_infra&asianext.com | 2024-04-05 | |
| BCG Group | NetworkEngineering&cantor.com | 2025-02-25 | |
| Attila Miklóš | attila.miklos&orange.com | 2021-06-11 | |
| Bernd Uphoff | bernd.uphoff&deutsche-boerse.com | 2018-06-19 | |
| Bert van Willigen | bert.vanwilligen&philips.com | 2004-01-01 | |
| Beverly Schwartz | bschwart&bbn.com | 1998-06-01 | |
| Bill Manning | bmanning&isi.edu | 1999-08-01 | |
| Bill Schilit | schilit&parc.xerox.com | ||
| Bill Simpson | bill.simpson&um.cc.umich.edu | 1994-11-01 | |
| Bill Woodcock | woody&zocalo.net | 1998-11-01 | |
| Bob Braden | braden&isi.edu | 1996-04-01 | |
| Bob Brzezinski | bob.brzezinski&activfinancial.com | 2005-10-28 | |
| Bob Gaddie | bobg&dtn.com | 1998-08-01 | |
| Bob Meier | meierb&norand.com | 1997-12-01 | |
| Bob Scheifler | Bob.Scheifler&sun.com | 1998-08-01 | |
| Bob Sledge | bob&pqsystems.com | 1998-12-01 | |
| Bodo Rueskamp | br&itchigo.com | 2000-03-01 | |
| BOX TECHNOLOGY CANADA INC. | 2024-02-27 | ||
| Brendan Eic | brendan&illyria.wpd.sgi.com | ||
| Brian Kean | bkean&dca.com | 1995-08-01 | |
| Brian Kerkan | brian&satcomsystems.com | 2000-05-01 | |
| Brian Martinicky | Brian_Martinicky&automationintelligence.com | 2000-03-01 | |
| Brian Trudeau | btrudeau&onechicago.com | 2014-09-19 | |
| Bruce Factor | ahi!bigapple!bruce&uunet.uu.net | ||
| Bryan Costales | bcx&infobeat.com | 1997-09-01 | |
| Bryant Eastham | protocol&opendof.org | 2015-04-23 | |
| Beirut Stock Exchange | itd&bse.com.lb | 2019-01-17 | |
| Caleb Bell | cbell&rxnetworks.com | 2012-11-19 | |
| Carl-Johan Sjöberg | cjs&bitsend.se | 2012-04-25 | |
| Carl Malamud | carl&media.org | 2014-01-03 | |
| Cantor Fitzgerald | networkengineering&cantor.com | 2023-01-18 | |
| Cboe Bats, LLC | poc&cboe.com | 2025-04-01 | |
| Cboe POC | Cboe Bats, LLC | poc&cboe.com | 2025-04-01 |
| Charles Gomes | noc&clearpoolgroup.com | 2023-06-05 | |
| Charles Lo | clo&qti.qualcomm.com | 2022-11-02 | |
| Charles Tewiah | charles.tewiah&westlb-systems.co.uk | 2005-09-01 | |
| Chas Honton | chas&secant.com | 1997-12-01 | |
| Choon Lee | cwl&nsd.3com.com | 1996-04-01 | |
| Chris Adams | jc.adams&reuters.com | 2000-07-01 | |
| Christopher Mettin | cmettin&gqbc-online.com | 2009-05-12 | |
| Chuck McManis | cmcmanis&sun.com | ||
| CIX Trading | operations&thecix.ca | 2025-09-18 | |
| Clearpool | noc&clearpoolgroup.com | 2023-06-05 | |
| Clem Verwey | clemv&jse.co.za | 2011-12-07 | |
| Cleverson Arashiro | A5X | shiro&a5x.com.br | 2026-01-27 |
| CME Group | networkengineering&cmegroup.com | 2024-08-06 | |
| Colin Caughie | cfc&indigo-avs.com | 2000-05-01 | |
| Coinbase | markets-infra&coinbase.com | 2019-01-28 | |
| COMTECH Kft. | dev&comtech.co.hu | 2016-10-20 | |
| Craig Dowell | cdowell&quicinc.com | 2011-11-18 | |
| Dan Jackson | jdan&us.ibm.com | 1997-09-01 | |
| Dan Jakubiec | dan.jakubiec&systech.com | 2006-09-21 | |
| Daniel Dissett | ddissett&peerlogic.com | 1998-12-01 | |
| Daniel Steinber | Daniel.Steinberg&eng.sun.com | ||
| Darcy Brockbank | darcy&hasc.com | 1997-12-01 | |
| Darrell Sveistrup | darrells&truesolutions.net | 1999-06-01 | |
| Darren Molloy | CIX Trading | darren&thecix.ca | 2025-09-18 |
| Dave Cheriton | cheriton&dsg.stanford.edu | ||
| Dave Glanzer | dave.glanzer&fieldbus.org | 2003-03-01 | |
| Dave Thaler | dthalerµsoft.com | 2000-06-01 | |
| David Beattie | Global Futures and Options Limited | david.beattie&gfo-x.com | 2023-03-15 |
| David Brett | david.brett&thecse.com | 2016-04-19 | |
| David Meyer | meyer&ns.uoregon.edu | 1997-01-01 | |
| David Mills | mills&udel.edu | ||
| David Poole | davep&extendsys.com | 1997-04-01 | |
| David Rubin | drubin&ncc.net | 1996-08-01 | |
| David Wilson | dwilson&m-x.ca | 2013-05-30 | |
| Dean Blackketter | dean&corp.webtv.net | 1998-11-01 | |
| Dino Farinacci | dino&procket.com | 1996-03-01 | |
| Dirk Koopman | djk&tobit.co.uk | 2000-07-01 | |
| Dmitri Kisten | Alcorn McBride, Inc. | dmitri&alcorn.com | 2025-12-01 |
| Doug Dillon | dillon&hns.com | 1998-08-01 | |
| Douglas Marquardt | dmarquar&woz.org | 1997-02-01 | |
| Duane Wessels | wessels&nlanr.net | 1997-02-01 | |
| Ed Moran | admin&cruzjazz.com | 1997-10-01 | |
| Ed Purkiss | epurkiss&wdmacodi.com | 1998-09-01 | |
| Eric Hall | ehall&ntrg.com | 1999-10-01 | |
| Erick MacDonald Filzek | filzek&wisehome.io | 2023-08-09 | |
| Erik Guttman | Erik.Guttman&sun.com | 2001-12-01 | |
| Ernst EDER | tech&lonmark.org | 2018-11-19 | |
| Euronext Admin | iana-admin&euronext.com | 2014-11-24 | |
| Evan Caves | evan&acc.com | 1998-06-01 | |
| Florian Weimer | fweimer&redhat.com | 2013-02-08 | |
| Fred Baker | fred&cisco.com | 1997-06-01 | |
| Gajendra Shukla | gshukla&proxim.com | 2002-02-01 | |
| Gamini Karunaratne | gkarunaratne&miami-holdings.com | 2023-05-24 | |
| Gary S. Malkin | GMALKIN&xylogics.com | ||
| Gary Scott Malkin | gmalkin&baynetworks.com | 1998-02-01 | |
| Gavin McKee | gav.mckee&coinbase.com | 2019-01-25 | |
| Gene Marsh | MarshM&diebold.com | 1998-11-01 | |
| Geoff Golder | geoffgolder&gmail.com | 2016-04-19 | |
| Geoff Mendal | mendal&talarian.com | 1999-01-01 | |
| George Neville-Neil | gnn&neville-neil.com | 2014-12-17 | |
| Giovanni Marzot | gmarzot&ramp.com | 2019-03-13 | |
| Giovanni Marzot | gmarzot&vivoh.com | 2023-10-13 | |
| Global Futures and Options Limited | david.beattie&gfo-x.com | 2023-03-15 | |
| Grant Taylor | grantwtt&gmail.com | 2016-10-04 | |
| Guido Petronio | guido.petronio&moneyline.com | 2004-01-01 | |
| Guilherme Longanezi | glonganezi&bvmf.com.br | 2016-09-27 | |
| Hatice Unal | CAN-Tech-Network&itg.com | 2019-01-25 | |
| Heiko Rupp | hwr&xlink.net | 1997-01-01 | |
| Henri Moelard | HMOELARD&wcnd.nl.lucent.com | 1998-03 | |
| Henrik Lans | henrik.lans&telia.no | 2019-09-27 | |
| Hiroshi Okubo | okubo.hiroshi&canon.co.jp | 2014-08-01 | |
| Howard Gordon | hgordon&xingtech.com | ||
| IANA | iana&iana.org | ||
| Ian Armitage | ian&coactive.com | 1999-08-01 | |
| Ian Stewart | iandbige&yahoo.com | 1999-06-01 | |
| Ian Wacey | iain.wacey&gefalbany.ge.com | 2000-05-01 | |
| Ian Wilson | iwilson&cisco.com | 2001-12-01 | |
| Ido Rosen | ido&kernel.org | 2021-03-23 | |
| Instinet | uk.networks&instinet.co.uk | 2019-08-29 | |
| Intercontinental Exchange, Inc. | riradmin&theice.com | 2023-04-10 | |
| IOT COMPANY SOLUCOES TECNOLOGICAS LTDA | contato&wisehome.io | 2023-08-09 | |
| IP Admin | ipaddr&agilent.com | 2015-10-12 | |
| IPadmin - Orange Slovensko a.s. | supervision&orange.sk | 2021-06-11 | |
| Ishan Wu | iwu&cisco.com | 2000-03-01 | |
| Itamar Gilad | itamar&arootz.com | 2007-08-31 | |
| J. Ryan Stinnett | jryans&mozilla.com | 2014-07-01 | |
| James Crawford | jcrawford&metropol.net | 1998-05-01 | |
| Jan Drwal | Jan.Drwal&deutsche-boerse.com | 2011-12-19 | |
| Japan Exchange Group | ITD-tradingsystem&jpx.co.jp | 2021-09-07 | |
| Japan Exchange Group/Osaka Exchange, Inc. | o-derisys-Op_Infra&jpx.co.jp | 2024-06-25 | |
| Jasmine Strong | jasmine&heroicrobotics.com | 2014-06-04 | |
| Javier Torres | Members Exchange (MEMX) | jtorres&memx.com | 2024-01-22 |
| Jean-Marc MAGNIER | f1sca&sfr.fr | 2021-02-03 | |
| Jeff Schenk | Jeff.Schenk&intelliden.com | 2006-03-31 | |
| Jerome Albin | albin&taec.enet.dec.com | 1997-06-01 | |
| Jerry Whitaker | jwhitaker&atsc.org | 2008-12-19 | |
| Jim Ginsburg | JGinsburg&jonescorp.com | 2007-10-31 | |
| Jim Lyle | jim.lyle&siliconimage.com | 2006-08-07 | |
| Jim Toga | jtoga&ibeam.jf.intel.com | 1996-05-01 | |
| Joel Lynch | joel.lynch&cnn.com | 1999-04-01 | |
| Johan Deleu | johan.deleu&alcatel.be | 2002-02-01 | |
| John Catherino | cajo&dev.java.net | 2006-03-31 | |
| John Gabler | john.gabler&ips.invensys.com | 2007-07-06 | |
| John Veizades | veizades&tgv.com | 1995-05-01 | |
| Jon Crowcroft | jon&hocus.cs.ucl.ac.uk | 1998-11-01 | |
| Jon Gabriel | grabriel&tivoli.com | 1998-12-01 | |
| Jon Postel | postel&isi.edu | ||
| Jonathan Niedfeldt | jon&digitalacoustics.com | 2008-02-22 | |
| Joost Demarest | KNX Association | joost.demarest&knx.org | 2023-08-23 |
| Jose Luis Marocho | 73374.313&compuserve.com | 1996-07-01 | |
| Juan Ayas | jayas&lda-audiotech.com | 2018-10-17 | |
| Julian Nevell | JNEVELL&vbs.bt.co.uk | 1999-08-01 | |
| Justin Beaman | justin.beaman&midwestvideosolutions.com | 2022-06-09 | |
| Kalejdo TV | mikael.nyberg&kalejdo.tv | 2022-08-31 | |
| Kang Lee | kang.lee&nist.gov | 2007-02-02 | |
| Karel Vesely | Nej.cz s.r.o. | karel.vesely&nej.cz | 2024-01-23 |
| Karen Seo | kseo&bbn.com | ||
| Karl Elad | karl.elad&intelsat.com | 2006-03-31 | |
| Keith Thompson | thompson&ridgeback.east.sun.com | 2001-06-01 | |
| Kelly Littlepage | kelly&onechronos.com | 2023-08-29 | |
| Kevin Gross | kvng&ieee.org | 2010-03-12 | |
| Kevin Gross | kevin.gross&avanw.com | 2012-08-28 | |
| Kevin McNicholas | kevin.mcnicholas&lucera.com | 2026-06-26 | |
| KNX Association | joost.demarest&knx.org | 2023-08-23 | |
| KPN IP Office | kpn-ip-office&kpn.com | 2011-04-18 | |
| Kristian A. Bognaes | kristian.bognaes&norman.com | 2014-01-08 | |
| Lau Wei Lun | weilun.lau&asianext.com | 2023-03-03 | |
| LDA Audio Tech | info&lda-audiotech.com | 2018-10-19 | |
| Lev V. Cherednikov | lev.cherednikov&nbn-holding.ru | 2014-04-12 | |
| Liming Wei | lwei&cisco.com | 1998-10-01 | |
| LIRNEasia | nuwan&lirneasia.net | 2020-10-07 | |
| Lloyd Wood | L.Wood&surrey.ac.uk | 2011-03-17 | |
| LME Networks | London Metal Exchange | LME.Network&lme.com | 2023-04-27 |
| London Metal Exchange | LME.Network&lme.com | 2023-04-27 | |
| London Stock Exchange Group | https://www.lseg.com | 2021-09-21 | |
| LonMark International | tech&lonmark.org | 2018-11-19 | |
| Louis Mamakos | louie&uu.net | 1997-03-01 | |
| Lucera Financial Infrastructures | support&lucera.com | 2026-06-26 | |
| Lynton Auld | lauld&rgb.com | 2024-11-04 | |
| Maarten van Malland | Sentillia | maarten&sentillia.com | 2025-10-10 |
| Madhav Karhade | Madhav.Karhade&wibhu.com | 2003-05-01 | |
| Mark Armstrong | Mark.Armstrong&soleratec.com | 2006-02-09 | |
| Mark Bakke | mbakke&cisco.com | 2001-12-01 | |
| Mark Hamilton | mah&spectralink.com | 1998-11-01 | |
| Mark Handley | mjh&isi.edu | 1998-12-01 | |
| Mark Lewis | Mark_Lewis&ccm.jf.intel.com | 1995-10-01 | |
| Mark Lipford | mark.a.lipford&sprint.com | 2006-07-11 | |
| Marlon Berlin | marlon.berlin&dns-net.de | 2013-05-25 | |
| Martin Forssen | maf&dtek.chalmers.se | ||
| Mary Timm | mary&xenoscience.com | 1998-07-01 | |
| Masato Shindoh | jl11456&yamato.ibm.co.jp | 1997-08-01 | |
| Matthew Straight | matt_straight&yahoo.com | 2007-03-01 | |
| Maurice Robberson | ceo&mediastreamusa.com | 2006-09-15 | |
| Media Systems OOO | noc&n3.ru | 2021-10-22 | |
| Mellanox Technologies, Inc. | info&mellanox.com | 2019-07-01 | |
| Members Exchange (MEMX) | jtorres&memx.com | 2024-01-22 | |
| Meridian Labs LTD. | mark.wood&meridianlabs.org | 2020-10-07 | |
| Miami International Security Exchange | networking&miami-holdings.com | 2023-05-24 | |
| Michael Caravetta | Network_Reps&tsx.com | 2013-06-03 | |
| Michael DeMoney | demoney&eng.sun.com | 1997-04-01 | |
| Michael Dolan | miked&tbt.com | 2003-10-01 | |
| Michael Lyle | protocols&translattice.com | 2009-11-11 | |
| Michael Rosenberg | Nasdaq Inc. | michael.rosenberg&nasdaq.com | 2024-02-01 |
| Michael Wang | Michael.Wang&usa.xerox.com | 1999-03-01 | |
| Midwest Video Solutions | support&midwestvideosolutions.com | 2019-11-13 | |
| Mika Uusitalo | msu&xingtech.com | 1997-04-01 | |
| Mike King | mike.king&philips.com | 2019-02-07 | |
| Mike Pontillo | mike.pontillo&canonical.com | 2017-05-19 | |
| Mike Rodbell | mrodbell&ciena.com | 1997-01-01 | |
| Mike Roper | mroper&8x8.com | 1999-09-01 | |
| Mike Velten | mike_velten&liebert.com | 1999-01-01 | |
| Moe Singh | moesingh&hotmail.com | 2009-09-24 | |
| Morten Lindeman | Morten.Lindeman&os.telia.no | 1999-03-01 | |
| Morteza Kalhour | morteza.kalhour&nokia.com | 2002-10-01 | |
| Muhammad Mazhar Cheema | Members Exchange (MEMX) | mcheema&memx.com | 2025-12-03 |
| Nadine Guillaume | nadine.guillaume&sciatl.com | 2005-02-01 | |
| Nasdaq Inc. | network-request&nasdaq.com | 2024-02-01 | |
| Neal Lawrence | neal.lawrence&a2x.co.za | 2017-06-02 | |
| Nedelcho Stanev | nstanev&csoft.bg | 1999-05-01 | |
| Nej.cz s.r.o. | lir&nej.cz | 2024-01-23 | |
| NE-TEAM_at_telecomsys.com | NE-TEAM&telecomsys.com | 2014-11-07 | |
| Nick Barendt | nbarendt&vxitech.com | 2005-11-01 | |
| Nigel Thompson | nigelt&tribal.com | 1999-01-01 | |
| Nova Goose Global Publishing Group Inc. | ngg-Publishing&hotmail.com | 2026-08-20 | |
| OCX Group Inc | noc&onechronos.com | 2023-08-29 | |
| Oliver Lewis | o.lewis&icerobotics.co.uk | 2006-07-11 | |
| OPC Foundation | sysadmin&opcfoundation.org | 2019-08-19 | |
| OSPF WG Chairs | ospf-chairs&ietf.org | ||
| Oyvind H. Olsen | oyvind-hollup.olsen&canaldigital.com | 2007-09-12 | |
| Paolo Strazzera | p.strazzera&telematica.it | 1999-06-01 | |
| Patrick Cipiere | Patrick.Cipiere&udcast.com | 2001-01-01 | |
| Paul Langille | plangille&dnpg.com | 2007-01-17 | |
| Paul Roberts | networks&aquis.eu | 2021-12-21 | |
| Paul Suhler | paul.suhler&quantum.com | 2009-05-12 | |
| Paul Wallner | paul.wallner&wienstrom.at | 2010-09-14 | |
| Paul Wissenbach | paulwi&vnd.tek.com | 1997-06-01 | |
| Peter Aronson | paronson&esri.com | 1998-08-01 | |
| Peter Parnes | peppar&marratech.com | 2000-02-01 | |
| Peter White | peter_white&3com.com | 1999-04-01 | |
| Philips Healthcare | bill.holden&philips.com | 2019-02-07 | |
| Pico | sales&pico.net | 2020-07-22 | |
| Pico Network Engineering | neteng&pico.net | 2026-03-10 | |
| Pico Sales | sales&pico.net | 2020-07-22 | |
| Pierre Oliver | polivier&calamp.com | 2011-06-06 | |
| Piers Scannell | piers&globecastne.com | 2000-03-01 | |
| Pilz GmbH and Co. KG | pilz.gmbh&pilz.de | 2009-03-17 | |
| Prakash Banthia | prakash_banthia&3com.com | 1998-09-01 | |
| Ralph Kammerlander | ralph.kammerlander&khe.siemens.de | 2000-06-01 | |
| Ram Iyer | ram&aaccorp.com | 1998-03-01 | |
| Rami Chalhoub | itd&bse.com.lb | 2019-01-17 | |
| Ramp Holdings | ops&ramp.com | 2019-03-28 | |
| Raymond Shum | rshum&ms.com | 1998-04-01 | |
| RGB Spectrum | lauld&rgb.com | 2024-11-15 | |
| Richard Hodges | rh&source.net | 1999-03-01 | |
| Richard Zulch | richard_zulch&dantz.com | 2004-05-01 | |
| RIR Admin | riradmin&theice.com | 2023-04-10 | |
| Rob Janssen | rob&pe1chl.ampr.org | 1995-01-01 | |
| Robert Hodgson | robert¶tek.co.uk | 2001-12-01 | |
| Robert Sautter | rsautter&acdnj.itt.com | 1999-08-01 | |
| Robert Sliwinski | sliwinre&mail1st.com | 2000-02-01 | |
| Robert Taylor | rtaylor&digicelgroup.com | 2016-09-29 | |
| Roberto Costa Simoes | rcosta&bvmf.com.br | 2010-08-18 | |
| RTP Media | cgs&rtp.media | 2021-07-30 | |
| Ruben Hernandez | ruben.hernandez&tradeweb.com | 2022-01-06 | |
| Ryan Taylor | ryan&osibytes.com | 2025-11-13 | |
| Ryon Coleman | rcoleman&3eti.com | 2006-04-11 | |
| SEIKO EPSON Corp | ogata.hideaki&exc.epson.co.jp | 2005-01-01 | |
| Sakon Kittivatcharapong | sakonk&cscoms.net | 2000-05-01 | |
| Scott Watson | scott&disney.com | 1997-08-01 | |
| Semtech Corporation | aptovision_support&semtech.com | 2019-02-22 | |
| Sentillia | systems&sentillia.com | 2025-10-13 | |
| Sergey Shulgin | sshulgin&pinkotc.com | 2008-08-12 | |
| Shachar Dor | shachard&mellanox.com | 2019-07-01 | |
| Shai Revzen | shai.revzen&harmonicinc.com | 1999-04-01 | |
| Shane Rowatt | shane.rowatt&star.com.au | 1997-03-01 | |
| Shivaun Albright | shivaun_albright&hp.com | 1997-07-01 | |
| Simon Barber | simon.barber&parc.com | 2009-09-24 | |
| Soren Martin Sorensen | sms&energimidt.dk | 2006-08-07 | |
| Stacey O'Rourke | stacey&network-alchemy.com | 1999-08-01 | |
| Stacey O'Rourke | stacey&cips.nokia.com | 2001-01-01 | |
| Stephan Wasserroth | wasserroth&fokus.gmd.de | 2000-07-01 | |
| Stephen Dunne | sdun&isma.co.uk | 1997-01-01 | |
| Stephen Hanna | steve.hanna&sun.com | 2000-07-01 | |
| Stephen Ray Middleton | stephen.r.middleton&verizon.com | 2015-03-23 | |
| Stephen T. Lyda | slyda&emsg.com | 2000-02-01 | |
| Steve Casner | casner&precept.com | ||
| Steve Casner | casner&isi.edu | 1995-01-01 | |
| Steve Deering | deering&cisco.com | 1999-10-01 | |
| Steve Deering | deering&parc.xerox.com | ||
| Steve Loizou | BCG Group | steve.loizou&bgcg.com | 2025-02-25 |
| Steve Polishinski | spolishinski&etcconnect.com | 2000-03-01 | |
| Stuart Kerry | stuart.kerry&philips.com | 2003-01-01 | |
| Susie Armstrong | Armstrong.wbst128&xerox.com | ||
| Takeshi Saito | takeshi.saito&toshiba.co.jp | 2003-02-01 | |
| Technicolor NL NOC | noc&technicolor.com | 2009-12-23 | |
| Telia-Norway-Get-NOC | noc&get.no | 2019-08-28 | |
| Terry Gibson | terry.gibson&sun.com | 1997-08-01 | |
| Tetsuo Hoshi | tetsuo.hoshi&jp.yokogawa.com | 2004-06-01 | |
| Thomas Sörlin | ts&pergas.se | 2022-08-31 | |
| Tim DeBaillie | debaillie&ciholas.com | 2006-11-30 | |
| TMX | shelley.lindsay&tmx.com | 2023-04-14 | |
| TMX Network Engineering | network.engineering&tmx.com | 2023-04-14 | |
| Tom Ballister | tom&ballister.com | 2021-06-11 | |
| Tom Blank | tomblankµsoft.com | 1996-11-01 | |
| Tom White | info&midi.org | 2011-11-02 | |
| Tony Ballardie | A.Ballardie&cs.ucl.ac.uk | 1997-02-01 | |
| Tony Barber | tony.barber&wcom.com | 1997-01-01 | |
| Tony Przygienda | prz&siara.com | 1999-10-01 | |
| Tony Wong | wongt&ms.com | 1998-07-01 | |
| Tradeweb Markets Inc | usnetworkoperations&tradeweb.com | 2022-01-19 | |
| Tradition Network Operations and Command Center | SH-Networking&tradition.com | 2010-09-22 | |
| TV System Administrators | Ålands Telekommunikation Ab | tv-noc&alcom.ax | 2019-02-28 |
| UPnP Forum | upnpadmin&forum.upnp.org | 2006-06-27 | |
| Vadim B. Kantor | v.kantor&gksks.ru | 2021-07-30 | |
| Vanya Levy | vlevy&semtech.com | 2019-02-20 | |
| Victor Volpe | vvolpe&smtp.microcom.com | 1997-10-01 | |
| Vivoh | gmarzot&vivoh.com | 2023-10-16 | |
| Vladimir Shishkov | v.shishkov&vconnect.ru | 2017-02-17 | |
| Wally Beddoe | WBeddoe&tkusa.com | 2003-04-01 | |
| Walter Wallach | walt&sumatech.com | 1999-07-01 | |
| Wayne Carr | Wayne_Carr&ccm.intel.com | 1997-12-01 | |
| Wayne Wenyu Liu | wayne.wenyu.liu&gmail.com | 2012-06-12 | |
| Wenjie Peng | wpeng&tts.telerate.com | 1997-01-01 | |
| Werner Vogels | vogels&rnets.com | 1998-08-01 | |
| Wieland Holdfelder | whd&pi4.informatik.uni-mannheim.de | 1997-01-01 | |
| Xiaoyu Zhou | zhouxyi&lenovo.com | 2009-01-20 | |
| Xie Shao | xieshao&tnn.cc | 2023-01-18 | |
| Yea Uang | uang&force.decnet.lockheed.com | 1994-11-01 | |
| Yossi Gal | yossi&gilat.com | 1998-02-01 | |
| Zia Bhatti | zia&netright.com | 1998-09-01 |