Dear colleagues

APNIC has now implemented the next phase of the transition to four-byte AS numbers.

Beginning today, APNIC assigns four-byte AS numbers by default when receiving requests for AS numbers. Two-byte AS numbers will only be assigned if the applicant can demonstrate that a four-byte only AS number is unsuitable.

For more information on the implementation phases of the four-byte AS number policy, please see section 6.3 of:

Policies for Autonomous System number management in the Asia Pacific region http://www.apnic.net/asn-policy

To learn more about how the transition to four-byte AS numbers may affect your network, see:

http://icons.apnic.net/asn

If you have any questions, please contact:

helpdesk@apnic.net

Regards