[178795] in North American Network Operators' Group

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Re: ASN to IP Mapping

daemon@ATHENA.MIT.EDU (Hank Nussbacher)
Sat Mar 7 16:08:06 2015

X-Original-To: nanog@nanog.org
Date: Sat, 07 Mar 2015 23:04:54 +0200
To: Andrew Iwamoto <aiwamoto@unleashed-technologies.com>,
 "nanog@nanog.org" <nanog@nanog.org>
From: Hank Nussbacher <hank@efes.iucc.ac.il>
In-Reply-To: <SN2PR10MB00798D50B57797F7DADB82B2F61D0@SN2PR10MB0079.nampr
 d10.prod.outlook.com>
Errors-To: nanog-bounces@nanog.org

At 15:37 07/03/2015 +0000, Andrew Iwamoto wrote:
>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.

I use the excellent tool:
http://bgp.he.net/

and select the "Prefixes V4" tab after entering the ASN in the webform.

-Hank


>Thank you.
>
>Andrew Iwamoto
>Unleashed Technologies


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