[arin-announce] ARIN Switching to ASPLAIN Notation, 13 March 2009

Member Services info at arin.net
Tue Mar 10 09:01:31 EDT 2009

With the publication of RFC 5396, the IETF standardized the 
representation of all Autonomous System (AS) Numbers in the ASPLAIN 
format.  In order to comply with this new standard, ARIN will be 
deprecating AS-DOT notation for 4-byte AS numbers in favor of ASPLAIN 
notation on March 13, 2009, at approximately 10:00PM EDT.  This event 
will not interrupt any ARIN-provided services, and the only noticeable 
change will be to the display of 4-byte AS numbers in ARIN WHOIS.

Please note that ARIN WHOIS will continue to accept queries in both 
ASPLAIN and AS-DOT notation.

You can view RFC 5396 at: http://tools.ietf.org/html/rfc5396

If you have any questions or concerns, please do not hesitate to contact 
hostmaster at arin.net.


Mark Kosters
Chief Technical Officer
American Registry for Internet Numbers (ARIN)

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