Useful Links
From AS4
Contents |
Assignments and Standards
- IANA Autonomous System (AS) Number Assignments
- IANA Capability Code Assignments
- RFC 4893: BGP Support for Four-octet AS Number Space
- RFC 5396: Textual Representation of Autonomous System (AS) Numbers
- RFC 5398: Autonomous System (AS) Number Reservation for Documentation Use
- I-D: Four-octet AS Specific BGP Extended Community
RIR Policies
Presentations and Resources
- Introduction to Four-byte AS Numbers at APNIC has a lot of information and resources for operators
Conference Presentations
- 4-Byte AS Numbers by Geoff Huston (APRICOT 2007; 28 February, 2007)
- 32-bit ASNs by Philip Smith (MENOG 2; 21 November, 2008)
- 32-bit ASNs by Greg Hankins and Chris Malayter (NANOG45; 27 January, 2009)
- Action Required: 32 Bit ASNs by Andy Davidson (MENOG 10; May 1, 2012)
Online Tools
- 16-bit AS Number Report: status report on the 16-bit AS number space and projection of when the pool will run out
- 32-bit AS Number Report: status report on the 32-bit AS number space
Software Tools
- Net::ASN: Perl module for converting between different 32-bit ASN notations

