[120268] in North American Network Operators' Group
Re: IP to authoritative CIDR webservices
daemon@ATHENA.MIT.EDU (Paul Ferguson)
Tue Dec 15 00:13:44 2009
In-Reply-To: <1260853078.6328.19.camel@petrie>
Date: Mon, 14 Dec 2009 21:12:28 -0800
From: Paul Ferguson <fergdawgster@gmail.com>
To: William Pitcock <nenolod@systeminplace.net>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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On Mon, Dec 14, 2009 at 8:57 PM, William Pitcock
<nenolod@systeminplace.net> wrote:
> Hi,
>
> Does anyone know of a webservice that converts a given IP into the
> public CIDR range that belongs to? I am developing a tool where IP to
> CIDR conversion based on RIR whois data would be useful for implementing
> filtersets.
>
WHOIS?
Alternatively, use the Team Cymru tool to find the AS, then the CIDR Report
portal to determine all perfixes originated by the AS in question:
http://asn.cymru.com/
http://www.cidr-report.org/
Apologies if you are seeking other magic...
- - ferg
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--
"Fergie", a.k.a. Paul Ferguson
Engineering Architecture for the Internet
fergdawgster(at)gmail.com
ferg's tech blog: http://fergdawg.blogspot.com/
