[17411] in North American Network Operators' Group
Re: Why does Sprint have address filters again?
daemon@ATHENA.MIT.EDU (Patrick W. Gilmore)
Mon Jun 1 03:43:29 1998
Date: Mon, 01 Jun 1998 00:36:19 -0700
To: nanog@merit.edu
From: "Patrick W. Gilmore" <patrick@priori.net>
In-Reply-To: <19980531185721.15318@mcs.net>
At 06:57 PM 5/31/98 -0500, Karl Denninger wrote:
>> Second Q: How many AS numbers are available in total?
>
>Currently an ASN is a 16-bit number.
And a whole lot (~1/2) are reserved to IANA. Specifically:
32768-64511 IANA-RSVD
64512-65535 IANA-RSVD2
You can find this on ftp://rs.arin.net/netinfo/asn.txt (even if it hasn't
been February ;).
The second block is the one you have to worry about since those numbers are
used for things like BGP confederations. I believe the first block could
be allocated to the general public, but you'd have to check with someone
more cluefull to be sure.
>Karl Denninger (karl@MCS.Net)| MCSNet - Serving Chicagoland and Wisconsin
TTFN,
patrick
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