Four-byte AS numbers now default assignment type

APNIC has implemented phase two of a globally coordinated transition to four-byte AS numbers.

APNIC has now implemented the second phase of the globally coordinated transition to four-byte AS numbers.

Organizations submitting requests for AS numbers from 1 January 2009 onwards will be assigned four-byte AS numbers by default. Organizations wishing to be assigned two-byte AS numbers can state this in the request form.

For more information on the implementation phases of the four-byte ASnumber policy, please see "Policies for Autonomous System number management in the Asia Pacific region" section 6.3, Timetable for moving from two-byte only AS numbers to four-byte AS numbers.

Information on four-byte AS numbers

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

Introduction to four-byte AS numbers

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