Service Name and Transport Protocol Port Number Registry
Last Updated
- 2026-10-13
Expert(s)
- TCP/UDP: Joe Touch; Eliot Lear, Kumiko Ono, Wes Eddy, Brian Trammell, and Michael Scharf
- SCTP: Michael Tuexen
- DCCP: Eddie Kohler and Yoshifumi Nishida
Reference
- RFC 6335: Internet Assigned Numbers Authority (IANA) Procedures for the Management of the Service Name and Transport Protocol Port Number Registry
Note
Service names and port numbers are used to distinguish between different services that run over transport protocols such as TCP, UDP, DCCP, and SCTP.
Service names are assigned on a First Come First Served basis, as described in RFC 6335.
Port numbers are divided into three ranges, with their uses and assignment procedures specified in Section 8.1.2 of RFC 6335:
- System Ports (0-1023) are assigned using the IETF Review or IESG Approval procedures.
- User Ports (1024-49151) are assigned using the IETF Review, IESG Approval, or Expert Review procedures.
- Dynamic and/or Private Ports (49152-65535) are not assigned.
The registration procedures for service names and port numbers are specified in RFC 6335, while the registration policies referenced above are defined in RFC 8126.
Assigned ports both System and User ports SHOULD NOT be used without or prior to IANA registration.
Assignment of a port number does not in any way imply an endorsement of an application or product, and the fact that network traffic is flowing to or from a registered port does not mean that it is "good" traffic, nor that it necessarily corresponds to the assigned service. Firewall and system administrators should choose how to configure their systems based on their knowledge of the traffic in question, not whether there is a port number registered or not.
Registration Forms
- To request a new assignment, please use the Application for Service Names and User Port Numbers form.
- To modify an existing assignment, please use the Modify a Port Number Assignment form.
Available Formats
| Service Name | Port Number | Transport Protocol | Description | Assignee | Contact | Registration Date | Modification Date | Reference | Service Code | Unauthorized Use Reported | Assignment Notes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| pstmailsync | tcp | File synchronization protocol for Pst Mail Sync | Arrow Bit SL | Javier Nigro | 2012-04-26 | Defined TXT keys: uuid=<unique instance identifier> | |||||
| pstmailsync-ssl | tcp | Secured file synchronization protocol for Pst Mail Sync | Arrow Bit SL | Javier Nigro | 2012-04-26 | Defined TXT keys: uuid=<unique instance identifier> | |||||
| ptnetprosrv2 | PTNetPro Service | Apple Computer | Apple Computer | Defined TXT keys: None Profiling and performance analysis protocol for Shark 4.0 and BigTop. | |||||||
| ptp-init | tcp | Picture Transfer Protocol(PTP) Initiator | Canon Inc. | Tatsuhiko Sakai | 2011-10-03 | Defined TXT keys: srvver, mn, mf, md, srv, tid | |||||
| ptp-req | PTP Initiation Request Protocol | Mark Wood | Mark Wood | Defined TXT keys: txtvers, guid, c0, c1, c2, ..., where the number of c_n attributes is variable | |||||||
| pulsar | tcp | Network service for Pulsar messaging and data sharing mobile app | Volodymyr Pavliuk | Volodymyr Pavliuk | 2024-02-19 | Defined TXT keys: None | |||||
| puzzle | Protocol used for puzzle games | Michael Thomason | Michael Thomason | Defined TXT keys: None | |||||||
| pvaccess | tcp | Experimental Physics and Industrial Control System | Matej Sekoranja | Matej Sekoranja | 2012-03-23 | Defined TXT keys: None | |||||
| qbox | QBox Appliance Locator | Geoff Back | Geoff Back | Defined TXT keys: None | |||||||
| qttp | QuickTime Transfer Protocol | Stuart Cheshire | Stuart Cheshire | Defined TXT keys: u=<username> p=<password> path=<path to document> (Same as for _http._tcp) | |||||||
| quad | tcp | Distributed Game Data | Niall Hogg | Niall Hogg | 2011-10-25 | Defined TXT keys: Proprietary | |||||
| quinn | Quinn Game Server | Simon Haertel | Simon Haertel | Defined TXT keys: None | |||||||
| qwady-peer | tcp | Encrypted nearby Peer media exchange | Qwady Solutions LLC | Joseph May | 2026-07-23 | Defined TXT keys: None | |||||
| qwizcollab | tcp | Broadcast of Qwizdom Presentation sessions for joining by a client, such as Qwizdom Notes+. | Qwizdom, Inc. | Matthew Owings | 2015-09-21 | Defined TXT keys: None | |||||
| rakket | Rakket Client Protocol | Orion Reblitz-Richardson | Orion Reblitz-Richardson | Defined TXT keys: None | |||||||
| radicle-node | Radicle peer to peer network | Radicle | Lorenz Leutgeb | 2025-08-15 | Defined TXT Keys: nid=<Node ID>, network=<Name of Network, e.g. 'main' or 'test'>, version=<Version Number> | ||||||
| radiotag | RadioTAG: Event tagging for radio services | Andy Buckingham | Andy Buckingham | Defined TXT keys: None | |||||||
| radiovis | RadioVIS: Visualisation for radio services | Andy Buckingham | Andy Buckingham | Defined TXT keys: None | |||||||
| radioepg | RadioEPG: Electronic Programme Guide for radio services | Andy Buckingham | Andy Buckingham | Defined TXT keys: None | |||||||
| radioport | tcp | RadioPort Message Service | Bob Iannucci | Bob Iannucci | 2011-11-23 | Defined TXT keys: NONE | |||||
| radioport | udp | RadioPort Message Service | Bob Iannucci | Bob Iannucci | 2011-11-23 | Defined TXT keys: NONE | |||||
| radiusdtls | udp | Authentication, Accounting, and Dynamic Authorization via the RADIUS protocol. This service name is used to construct the SRV service label "_radiusdtls" for discovery of RADIUS/DTLS servers. | IESG | IETF Chair | 2015-03-23 | 2015-10-06 | RFC 7585 | Defined TXT keys: None | |||
| radiustls | tcp | Authentication, Accounting, and Dynamic Authorization via the RADIUS protocol. This service name is used to construct the SRV service label "_radiustls" for discovery of RADIUS/TLS servers. | IESG | IETF Chair | 2015-03-23 | 2015-10-06 | RFC 7585 | Defined TXT keys: None | |||
| railduino | tcp | Model Railroad Messaging | Railduino | Volker Wiegand | 2018-01-08 | Defined TXT keys: role=master | |||||
| raop | Remote Audio Output Protocol (AirTunes) | BonjourDev | BonjourDev | 2011-10-14 | Defined TXT keys: None | ||||||
| rapta | tcp | Industrial IOT self-discovery network | Rapta, Inc | Matt Daue | 2022-09-22 | Defined TXT keys: version | |||||
| rbr | RBR Instrument Communication | Greg Johnson | Greg Johnson | Defined TXT keys: None | |||||||
| rce | PowerCard | DeVoeSquared | DeVoeSquared | Defined TXT keys: None | |||||||
| rdp | Windows Remote Desktop Protocol | Jugaari | Jugaari | Defined TXT keys: None | |||||||
| realplayfavs | RealPlayer Shared Favorites | RealNetworks | RealNetworks | Defined TXT keys: None | |||||||
| recipe-box | tcp | The Recipe Box Exchange | Corpus Collusion | Kathy Tafel | 2011-08-23 | Defined TXT keys: txtvers | |||||
| recipe-sharing | tcp | Recipe Sharing Protocol | Daniel G. Taylor | Daniel G. Taylor | 2007-11 | Defined TXT keys: http://www.recipemanager.org/rsp/rsp10draft.html#dnssd | |||||
| recolive-cc | tcp | Remote Camera Control | RecoLive Sàrl | Gabriele Mondada | 2012-08-29 | Defined TXT keys: txtvers, cid, nbd, cap | |||||
| recolive-cc | udp | Remote Camera Control | RecoLive Sàrl | Gabriele Mondada | 2012-08-29 | Defined TXT keys: txtvers, cid, nbd, cap | |||||
| recordit-itp | tcp | Recordit Image Transport Protocol | Freshout | Ruben Beltran del Rio | 2014-04-14 | Defined TXT keys: None | |||||
| remote | Remote Device Control Protocol | Gregory Dudek | Gregory Dudek | Defined TXT keys: txtvers=<TXT record version tag> protovers=<protocol vesion number> forground=<primary device or system> version=<firmware/instrument controller version> | |||||||
| remotebuddy | tcp | Remote Buddy remote control software command and data exchange | IOSPIRIT GmbH | Felix Schwarz | 2014-09-23 | Defined TXT keys: None | |||||
| remoteburn | LaCie Remote Burn | Serge DE LUCA | Serge DE LUCA | Defined TXT keys: server_version, min_client_version | |||||||
| renderpipe | ARTvps RenderDrive/PURE Renderer Protocol | Andrew Hoddinott | Andrew Hoddinott | Defined TXT keys: None | |||||||
| rendezvouspong | RendezvousPong | Math Game House Software | Math Game House Software | Defined TXT keys: None | |||||||
| renkara-sync | Renkara synchronization protocol | Michael J Primeaux | Michael J Primeaux | Defined TXT keys: None | |||||||
| resol-vbus | RESOL VBus | Daniel Wippermann | Daniel Wippermann | Defined TXT keys: None | |||||||
| retrospect | Retrospect backup and restore service | Michael Marks | Michael Marks | Defined TXT keys: None | |||||||
| rfbc | Remote Frame Buffer Client (Used by VNC viewers in listen-mode) | Ole-Morten Duesund | Ole-Morten Duesund | Defined TXT keys: server=dns-name/ip-address:port of currently displayed VNC server. Empty if not showing anything/available. | |||||||
| rfid | RFID Reader Mach1(tm) Protocol | Paul Dietrich | Paul Dietrich | Defined TXT keys: None | |||||||
| rgb | tcp | RGB Spectrum Device Discovery | RGB Spectrum | Steve Hershey | 2011-10-10 | Defined TXT keys: Keyboard, Mouse, Option1, Option2, Option3, Option4, ModelName | |||||
| riousbprint | Remote I/O USB Printer Protocol | Rob Newberry | Rob Newberry | Defined TXT keys: See BonjourPrinting.pdf. | |||||||
| roambot | tcp | Roambot communication | Roambotics, Inc. | Scott Menor | 2013-10-18 | Defined TXT keys: None | |||||
| robustirc | tcp | Like ircu (RFC 1459), but failure tolerant due to strong consistency among n>=3 servers | Michael Stapelberg | Michael Stapelberg | 2015-01-07 | Defined TXT keys: None | |||||
| roku-rcp | Roku Control Protocol | Don Woodward | Don Woodward | Defined TXT keys: txtvers=1 | |||||||
| roomcast-capi | tcp | RoomCast Control Protocol | Colin Corby | Colin Corby | 2017-02-01 | Defined TXT keys: protocolVersion, uuid | |||||
| roomcast-mapi | tcp | RoomCast Management Protocol | Colin Corby | Colin Corby | 2017-02-01 | Defined TXT keys: protocolVersion, uuid | |||||
| rql | RemoteQuickLaunch | Daniel Heffernan | Daniel Heffernan | Defined TXT keys: None | |||||||
| rr-disc | Robot Raconteur discovery | Wason Technology, LLC | John Wason | 2014-01-27 | Defined TXT keys: None | ||||||
| rradict | tcp | Ruckus Radio Access Device, Installation, Commissioning and Troubleshooting service. | Dave Stephenson | Dave Stephenson | 2016-03-09 | Defined TXT keys: txtvers=<version>, serial=<serial number>, mac=<mac-address>, model=<model number>, opMode=<operational mode>, tx=<transmitter-status>, timing=<timing-status> | |||||
| rsmp-server | Remote System Management Protocol (Server Instance) | Geoff Back | Geoff Back | Defined TXT keys: apiver=<major.minor> | |||||||
| rubygems | RubyGems GemServer | Rich Kilmer | Rich Kilmer | Defined TXT keys: None | |||||||
| rxxmiele | tcp | Miele protocol robot cleaners | Miele & Cie. KG | Dr. Nils Langhammer | 2018-04-20 | Defined TXT keys: txtvers and proprietary keys | |||||
| rym-rrc | tcp | Raymarine remote control protocol | Raymarine UK Limited | Geoffrey Beer | 2012-05-24 | 2012-06-04 | Defined TXT keys: raymarine-mfd-rrc-version, raymarine-mfd-model, raymarine-mfd-serial | ||||
| s2connect | tcp | S2 Connect energy management protocol | TNO | Wilco Wijbrandi | 2026-03-27 | Defined TXT Keys: https://docs.s2standard.org/docs/communication-layer/discovery-pairing-authentication/#dns-sd-based-discovery | |||||
| safarimenu | Safari Menu | Jesus De Meyer | Jesus De Meyer | Defined TXT keys: None | |||||||
| sallingbridge | Salling Clicker Sharing | Jonas Salling | Jonas Salling | Defined TXT keys: None | |||||||
| sallingclicker | Salling Clicker Service | Jonas Salling | Jonas Salling | Defined TXT keys: None | |||||||
| salutafugijms | Salutafugi Peer-To-Peer Java Message Service Implementation | David Walend | David Walend | Defined TXT keys: SalutaProperties | |||||||
| sandvox | Sandvox | Karelia Software | Karelia Software | Defined TXT keys: None | |||||||
| savagesoft | tcp | Proprietary Client Server Protocol | Andy Savage | Andy Savage | 2012-07-13 | Defined TXT keys: None | |||||
| sc-golf | StrawberryCat Golf Protocol | Phil Willoughby | Phil Willoughby | Defined TXT keys: None | |||||||
| scanner | Bonjour Scanning | Baskaran Subramaniam | Baskaran Subramaniam | Defined TXT keys: None | |||||||
| schdca | tcp | schindler internal messaging service | Schindler Aufzuege ag | Arno Odermatt | 2018-12-19 | Defined TXT keys: None | |||||
| schick | Schick | Heiko Kretschmer | Heiko Kretschmer | Defined TXT keys: None | |||||||
| schims | tcp | schindler internal messaging service | Schindler Aufzuege ag | Arno Odermatt | 2015-12-05 | Defined TXT keys: None | |||||
| schlog | tcp | logging service | Schindler Aufzuege ag | Arno Odermatt | 2015-12-05 | Defined TXT keys: None | |||||
| schmpp | tcp | Schindler maintenance portal protocol | Schindler Aufzuege ag | Arno Odermatt | 2015-04-30 | Defined TXT keys: None | |||||
| schoms | tcp | schindler object messaging system | Schindler Aufzuege ag | Arno Odermatt | 2015-05-12 | Defined TXT keys: None | |||||
| schsap | tcp | Schindler service authentication portal | Schindler Aufzuege ag | Arno Odermatt | 2015-04-30 | Defined TXT keys: None | |||||
| schsrmp | tcp | Schindler internal messaging service | Schindler Aufzuege ag | Arno Odermatt | 2017-07-07 | 2017-07-10 | Defined TXT keys: None | ||||
| schvpp | tcp | schindler internal messaging service | Schindler Aufzuege ag | Arno Odermatt | 2018-12-19 | Defined TXT keys: None | |||||
| scone | Scone | James Moore | James Moore | Defined TXT keys: None | |||||||
| scoop-sftp | tcp | The service name is used by the SFTP protocol to upload log files from vehicles to road side units in a securely way in a cooperative intelligent transportation system. | SCOOP@F Project | Houda Labiod | 2016-02-04 | Defined TXT keys: None | |||||
| scoop-sftp | udp | The service name is used by the SFTP protocol to upload log files from vehicles to road side units in a securely way in a cooperative intelligent transportation system. | SCOOP@F Project | Houda Labiod | 2016-02-04 | Defined TXT keys: None | |||||
| scpi-raw | IEEE 488.2 (SCPI) Socket | Nick Barendt | Nick Barendt | Defined TXT keys: None | |||||||
| scpi-telnet | IEEE 488.2 (SCPI) Telnet | Nick Barendt | Nick Barendt | Defined TXT keys: None | |||||||
| sdsharing | Speed Download | Yazsoft | Yazsoft | Defined TXT keys: None | |||||||
| secugen-connect | tcp | SecuGen Connect local biometric bridge | SecuGen Corporation | SecuGen Corporation | 2026-09-04 | 2026-09-07 | https://connect.secugen.com/dev-guide-doc/bridge-api-contract | Defined TXT keys: None | |||
| see | SubEthaEdit 2 | TheCodingMonkeys | TheCodingMonkeys | Defined TXT keys: txtvers=1, name=<Full Name>, userid=<User ID>, version=2 | |||||||
| seeCard | seeCard | Stefan Pantke | Stefan Pantke | Defined TXT keys: None | |||||||
| senteo-http | Senteo Assessment Software Protocol | Michael Boyle | Michael Boyle | Defined TXT keys: None | |||||||
| sentillion-vlc | Sentillion Vault System | George Hartz | George Hartz | Defined TXT keys: None | |||||||
| sentillion-vlt | Sentillion Vault Systems Cluster | George Hartz | George Hartz | Defined TXT keys: None | |||||||
| sepvsync | SEPV Application Data Synchronization Protocol | Kazuya Ogata | Kazuya Ogata | Defined TXT keys: Proprietary | |||||||
| serendipd | serendiPd Shared Patches for Pure Data | Hans-Christoph Steiner | Hans-Christoph Steiner | Defined TXT keys: None | |||||||
| servereye | ServerEye AgentContainer Communication Protocol | Andreas Behr | Andreas Behr | Defined TXT keys: None | |||||||
| servermgr | Mac OS X Server Admin | Jeff Albouze | Jeff Albouze | Defined TXT keys: None | |||||||
| services | DNS Service Discovery | Stuart Cheshire; Marc Krochmal | Stuart Cheshire; Marc Krochmal | Not a service type. Special name reserved for DNS-SD meta queries. | |||||||
| sessionfs | Session File Sharing | Anthony Williams | Anthony Williams | Defined TXT keys: Text keys are the file extensions of any file the user plans to share, i.e. pdf, doc, mp3. | |||||||
| setlistmaker-rc | tcp | Remote Control for Set List Maker app | Arlo Leach | Arlo Leach | 2017-04-21 | Defined TXT keys: None | |||||
| setlistmaker-ss | tcp | Screen sharing for Set List Maker app | Arlo Leach | Arlo Leach | 2017-04-21 | Defined TXT keys: None | |||||
| sftp-ssh | Secure File Transfer Protocol over SSH | Bryan Cole | Bryan Cole | Defined TXT keys: u=<username> p=<password> path=<path> | |||||||
| sge-exec | Sun Grid Engine (Execution Host) | Bill Van Etten | Bill Van Etten | Defined TXT keys: None | |||||||
| sge-qmaster | Sun Grid Engine (Master) | Bill Van Etten | Bill Van Etten | Defined TXT keys: None | |||||||
| shifter | Window Shifter server protocol | Antoine Martin | Antoine Martin | Defined TXT keys: username The login username to use (optional) ssh_tunnel Whether an SSH tunnel must be used (required) iface The network interface the server is on (required - may be empty) version Software version (required) ID Server Identifier (requried) |
Contact Information
| Name | Organization | Contact URI | Last Updated |
|---|---|---|---|
| Andreas Behr | andreas.behr&kraemer-it.de | ||
| Andrew Hoddinott | support&artvps.com | ||
| Andy Buckingham | feedback&radiodns.org | ||
| Andy Savage | andy.savage1&gmail.com | 2012-07-13 | |
| Anthony Williams | tonydubs&gmail.com | ||
| Antoine Martin | antoine&nagafix.co.uk | 2016-10-05 | |
| Apple Computer | perftools-feedback&group.apple.com | ||
| Arlo Leach | arlo&arlomedia.com | 2017-04-21 | |
| Arno Odermatt | Schindler Aufzuege ag | arno.odermatt&schindler.com | 2017-07-07 |
| Arrow Bit SL | info&arrowbit.com | 2012-04-26 | |
| Baskaran Subramaniam | baskaran&apple.com | ||
| Bill Van Etten | Bill&bioteam.net | ||
| Bob Iannucci | bob&rail.com | 2011-11-23 | |
| BonjourDev | bonjourdev&apple.com | 2011-10-14 | |
| Bryan Cole | bryan.cole&teraview.com | ||
| Canon Inc. | fujii.ken-ichi149&canon.co.jp | 2011-10-10 | |
| Colin Corby | colin.corby&teleadapt.com | 2017-02-01 | |
| Corpus Collusion | developer&corpuscollusion.com | 2011-08-23 | |
| Daniel G. Taylor | dan&programmer-art.org | 2007-11 | |
| Daniel Heffernan | me&daniel.ie | ||
| Daniel Wippermann | Daniel.Wippermann&resol.de | ||
| Dave Stephenson | dave.stephenson&ruckuswireless.com | 2016-03-09 | |
| David Walend | david&walend.net
dev&salutafugijms.dev.java.net |
||
| DeVoeSquared | support&devoesquared.com | ||
| Don Woodward | dwoodward&rokulabs.com | ||
| Felix Schwarz | IOSPIRIT GmbH | felix.schwarz&iospirit.com | 2014-09-23 |
| Freshout | navid&freshout.us | 2014-04-14 | |
| Gabriele Mondada | RecoLive Sàrl | gmondada&recolive.com | 2012-08-29 |
| Geoff Back | geoff&demonlair.co.uk | ||
| Geoff Back | geoff.back&autocue.co.uk | ||
| Geoffrey Beer | Raymarine UK Limited | Geoff.Beer&raymarine.com | 2012-05-24 |
| George Hartz | george.hartz&sentillion.com | ||
| Greg Johnson | greg.johnson&ieee.org | ||
| Gregory Dudek | dudek&y1d.com | ||
| Hans-Christoph Steiner | hans&eds.org | ||
| Heiko Kretschmer | info&wurst-wasser.net | ||
| Houda Labiod | SCOOP@F Project | houda.labiod&telecom-paristech.fr | 2016-02-04 |
| IESG | iesg&ietf.org | ||
| IETF Chair | IETF | chair&ietf.org | |
| IOSPIRIT GmbH | info&iospirit.com | 2014-09-23 | |
| James Moore | jam&wirerimmed.com | ||
| Javier Nigro | Arrow Bit SL | support&arrowbit.com | 2012-04-26 |
| Jeff Albouze | foup&apple.com | ||
| Jesus De Meyer | jesus&edot-studios.com | ||
| John Wason | Wason Technology, LLC | wason&wasontech.com | 2014-01-27 |
| Jonas Salling | jonas&salling.com | ||
| Joseph May | joedmay31&gmail.com | 2026-07-23 | |
| Jugaari | support&jugaari.com | ||
| Karelia Software | |||
| Kathy Tafel | Corpus Collusion | kt&corpuscollusion.com | 2011-08-23 |
| Kazuya Ogata | info&sepv.jp | ||
| Lorenz Leutgeb | lorenz.leutgeb&radicle.xyz | 2025-08-15 | |
| Marc Krochmal | marc&apple.com | ||
| Mark Wood | mark.d.wood&kodak.com | ||
| Matej Sekoranja | matej.sekoranja&cosylab.com | 2012-03-23 | |
| Math Game House Software | mathgamehouse&mac.com | ||
| Matt Daue | Rapta, Inc | mdaue&rapta.ai | 2022-09-22 |
| Matthew Owings | matt&qwizdom.com | 2015-09-21 | |
| Michael Boyle | michaelboyle&smarttech.com | ||
| Michael J Primeaux | michael.primeaux&renkara.com | ||
| Michael Marks | marks_michael&emc.com | ||
| Michael Stapelberg | michael+iana&stapelberg.ch | 2015-01-07 | |
| Michael Thomason | mthomason&gmail.com | ||
| Miele & Cie. KG | nils.langhammer&miele.de | 2018-04-20 | |
| Niall Hogg | niall.hogg&interamics.com | 2011-10-25 | |
| Nick Barendt | nbarendt&vxitech.com | ||
| Dr. Nils Langhammer | Miele & Cie. KG | nils.langhammer&miele.de | 2018-04-20 |
| Ole-Morten Duesund | ole-morten.duesund&bbvisuals.no | ||
| Orion Reblitz-Richardson | orionr&rakket.com | ||
| Paul Dietrich | registrar&impinj.com | ||
| Phil Willoughby | phil.willoughby&strawberrycat.com | ||
| Qwady Solutions LLC | jdmay&qwady.com | 2026-07-23 | |
| Qwizdom, Inc. | matt&qwizdom.com | 2015-09-21 | |
| Radicle | team&radicle.xyz | 2025-08-15 | |
| Railduino | volker&railduino.de | 2018-01-08 | |
| Rapta, Inc | admin&rapta.ai | 2022-09-22 | |
| Raymarine UK Limited | Geoff.Beer&raymarine.com | 2012-05-24 | |
| RealNetworks | macplayer&real.com | ||
| RecoLive Sàrl | recoinfo&recolive.com | 2012-09-07 | |
| RGB Spectrum | shershey&rgb.com | 2011-10-10 | |
| Rich Kilmer | rich&infoether.com | ||
| Roambotics, Inc. | iana&roambotics.com | 2013-10-18 | |
| Rob Newberry | rnewberry&apple.com | ||
| Ruben Beltran del Rio | Freshout | ben&freshout.us | 2014-04-14 |
| Schindler Aufzuege ag | arno.odermatt&schindler.com | 2018-12-19 | |
| SCOOP@F Project | houda.labiod&telecom-paristech.fr | 2016-02-04 | |
| Scott Menor | Roambotics, Inc. | scott&roambotics.com | 2013-10-18 |
| SecuGen Corporation | connect&secugen.com | 2026-09-04 | |
| Serge DE LUCA | sdeluca&lacie.com | ||
| Simon Haertel | simonhaertel&web.de | ||
| Stefan Pantke | sales&turingart.com | ||
| Steve Hershey | RGB Spectrum | shershey&rgb.com | 2011-10-10 |
| Stuart Cheshire | cheshire&apple.com | 2022-07-11 | |
| Tatsuhiko Sakai | Canon Inc. | sakai.tatsuhiko&canon.co.jp | 2011-10-03 |
| TheCodingMonkeys | monkeys&codingmonkeys.de | ||
| TNO | info&tno.nl | 2026-03-27 | |
| Volker Wiegand | volker&railduino.de | 2018-01-08 | |
| Volodymyr Pavliuk | gwotan&gmail.com | 2024-02-19 | |
| Wason Technology, LLC | wason&wasontech.com | 2014-01-27 | |
| Wilco Wijbrandi | wilco.wijbrandi&tno.nl | 2026-03-27 | |
| Yazsoft | info&yazsoft.com |