ARIN to Issue 4-byte ASNs by Default Starting on 1 January 2009 [Archived]
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Posted: Tuesday, 30 December 2008
Beginning on 1 January 2009, ARIN will be assigning four-byte Autonomous System Numbers (ASNs) by default, unless a 2-byte ASN is specifically requested. Following a globally coordinated policy, ARIN and all the Regional Internet Registries began allocating four-byte ASNs by request in January 2007; January 2009 marks the transition to allocating four-byte ASNs by default (see http://www.arin.net/policy/nrpm.html#five1).
Because this is a relatively new implementation, it is possible that some devices may not be able to recognize the new 4-byte ASNs. ARIN urges operators to verify that their routers and those of any transit providers or peers are ready and able to accept 4-byte ASNs.
Additional information about four-byte ASNs or how to request them can be found at:
Please contact hostmaster@arin.net if you have any questions concerning the ASN policy and four-byte ASNs.
Regards,
Leslie Nobile
Director, Registration Services
American Registry for Internet Numbers (ARIN)
OUT OF DATE?
Here in the Vault, information is published in its final form and then not changed or updated. As a result, some content, specifically links to other pages and other references, may be out-of-date or no longer available.