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ASN to IP Mapping

Subject: ASN to IP Mapping
From: gih at apnic.net (Geoff Huston)
Date: Sun, 8 Mar 2015 11:16:07 +1100
In-reply-to: <CAGFn2k3OL=XXD=8H_r_ZRLMRed1pwJTsgukJ1F+RYSxotZxs0A@mail.gmail.com>
References: <SN2PR10MB00798D50B57797F7DADB82B2F61D0@SN2PR10MB0079.namprd10.prod.outlook.com> <CAGFn2k3OL=XXD=8H_r_ZRLMRed1pwJTsgukJ1F+RYSxotZxs0A@mail.gmail.com>

> 
>> 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.
>> 
> 

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

Follow-Ups:
- ASN to IP Mapping
  - From: randy at psg.com (Randy Bush)

References:
- ASN to IP Mapping
  - From: aiwamoto at unleashed-technologies.com (Andrew Iwamoto)
- ASN to IP Mapping
  - From: rubensk at gmail.com (Rubens Kuhl)

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