[178800] in North American Network Operators' Group
Re: ASN to IP Mapping
daemon@ATHENA.MIT.EDU (Geoff Huston)
Sat Mar 7 19:16:18 2015
X-Original-To: nanog@nanog.org
From: Geoff Huston <gih@apnic.net>
In-Reply-To: <CAGFn2k3OL=XXD=8H_r_ZRLMRed1pwJTsgukJ1F+RYSxotZxs0A@mail.gmail.com>
Date: Sun, 8 Mar 2015 11:16:07 +1100
To: Rubens Kuhl <rubensk@gmail.com>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
>=20
>> Is there a tool or method to determine IP blocks assigned to an
>> organization by ASN? I.e. if I have an organization's ASN number I =
want to
>> know all blocks assigned to that ASN.
>>=20
>=20
If you want to know the registry assignments / allocations made to a =
single entity and be able group together these assignments of address =
prefixes and ASNs you should retrieve the combined extended stats file =
from the RIRs =
(https://www.nro.net/wp-content/uploads/apnic-uploads/delegated-extended) =
and group together all those entries with a common value in column 8 =
(except for the entries corresponding to assignments and allocations =
made by the RIPE NCC, where this information is, unfortunately, not =
published by them in such a convenient format.)
Geoff
=20=
