Internet Assigned Numbers Authority Special-Purpose Autonomous System (AS) Numbers Created 2014-03-11 Last Updated 2015-08-07 Available Formats [IMG] XML [IMG] HTML [IMG] Plain text Registry included below * Special-Purpose AS Numbers Special-Purpose AS Numbers Registration Procedure(s) IETF Review Reference [RFC7249] Available Formats [IMG] CSV AS Number Reason for Reservation Reference 0 Reserved by [RFC7607] [RFC7607] 112 Used by the AS112 project to sink misdirected DNS queries; see [RFC7534] [RFC7534] 23456 AS_TRANS; reserved by [RFC6793] [RFC6793] 64496-64511 For documentation and sample code; reserved by [RFC5398] [RFC5398] 64512-65534 For private use; reserved by [RFC6996] [RFC6996] 65535 Reserved by [RFC7300] [RFC7300] 65536-65551 For documentation and sample code; reserved by [RFC5398] [RFC5398] 4200000000-4294967294 For private use; reserved by [RFC6996] [RFC6996] 4294967295 Reserved by [RFC7300] [RFC7300] Licensing Terms