[arin-announce] ARIN Hosts 4-byte ASN Wiki

Member Services info at arin.net
Mon Jun 22 16:23:12 EDT 2009

In response to a suggestion received through the ARIN Consultation and 
Suggestion Process (ACSP), ARIN has created a wiki at 
www.get4byteasn.info to focus on issues related to 4-byte Autonomous 
System Numbers (ASNs). This wiki provides a central repository for 
ongoing discussion and information exchange associated with 4-byte ASN 
topics and issues.  

Ongoing Internet growth is rapidly depleting the existing pool of 2-byte 
ASNs (65,536 numbers in total). As a result, the IETF has approved the 
expansion of AS Numbers from 2-bytes to 4-bytes, to include over 4 
billion ASNs. Following a globally coordinated policy, ARIN and the 
other Regional Internet Registries began assigning 4-byte ASNs by 
request in January 2007 and by default in January 2009. However, some 
routers do not support the use of these 4-byte ASNs.

ARIN has set up this wiki to help educate the community about 4-byte ASN 
operational issues, to help vendors understand how to provide 4-byte ASN 
support in their products and to help network operators find those 
products. A wide range of community stakeholders will be able to share 
and benefit from information contributed to www.get4byteasn.info. ARIN 
looks forward to participation from everyone, including users, ISPs, and 
vendors, with interest in this topic.


Leslie Nobile
Director of Registration Services
American Registry for Internet Numbers (ARIN)

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