Update to the Autonomous System Number Registry

18 June 2008

The five Regional Internet Registries and the IANA have cooperated to provide an update to the IANA Autonomous System (AS) Numbers Registry. The updated registry keeps the same format but includes more detailed and accurate information about the whois servers providing registration information for individual AS Numbers.

In addition to the current format, the AS Numbers registry will be made available in XML during July.

The registry can be found at: