Special-Purpose Autonomous System (AS) Numbers

Created

  • 2014-03-11

Last Updated

  • 2015-08-07

Available Formats

Special-Purpose AS Numbers

Registration Procedure(s)

  • IETF Review

Reference

Available Formats

AS Number Reason for Reservation Reference
0 Reserved by RFC 7607 RFC 7607
112 Used by the AS112 project to sink misdirected DNS queries; see RFC 7534 RFC 7534
23456 AS_TRANS; reserved by RFC 6793 RFC 6793
64496-64511 For documentation and sample code; reserved by RFC 5398 RFC 5398
64512-65534 For private use; reserved by RFC 6996 RFC 6996
65535 Reserved by RFC 7300 RFC 7300
65536-65551 For documentation and sample code; reserved by RFC 5398 RFC 5398
4200000000-4294967294 For private use; reserved by RFC 6996 RFC 6996
4294967295 Reserved by RFC 7300 RFC 7300