I strongly advise against quick reallocation of returned AS numbers.
Returned AS numbers should stay out of service for a substantial
period of time.
The same should be true for other deactivated quantities such as
addresses, but that's a larger discussion.
Steve
On Apr 23, 2009, at 11:41 AM, john heasley wrote:
Thu, Apr 23, 2009 at 11:13:12AM -0400, Russ Housley:
I thought that the whole community would like to be aware of this
status.
Russ
My understanding is that the registries have not been reassigning ASNs
that are returns but were not allocated from IANA as part of a block.
AS1 for example, would not be reallocated if it were returned. So, in
theory there are far more available than this lets on.
From: Michelle Cotton <michelle(_dot_)cotton(_at_)icann(_dot_)org>
To: "iesg(_at_)ietf(_dot_)org" <iesg(_at_)ietf(_dot_)org>
Date: Wed, 22 Apr 2009 20:52:18 -0700
Subject: Status of the 16-bit AS Number space
Dear IESG,
This is to let you know what we now have fewer than 10 blocks of
16-bit AS Numbers left in the IANA free pool.
Yesterday we allocated two blocks of 1,024 AS Numbers to ARIN, as
per
the Global Policy for Allocation of ASN Blocks to Regional Internet
Registries, which was ratified by the ICANN board in July last year.
<http://www.icann.org/en/general/global-policy-asn-blocks-31jul08-en.htm
>http://www.icann.org/en/general/global-policy-asn-blocks-31jul08-en.htm
The unallocated 16-bit AS Number space is now 54272-64511. The full
registry can be viewed at:
<http://www.iana.org/assignments/as-numbers/as-numbers.xml>http://www.iana.org/assignments/as-numbers/as-numbers.xml
We agreed to notify the IESG when we got to this point in the AS
Numbers registry. Please let me know if you have any questions or
comments.
Kind regards,
Michelle Cotton
IANA
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