[120275] in North American Network Operators' Group
Re: IP to authoritative CIDR webservices
daemon@ATHENA.MIT.EDU (Tim Wilde)
Tue Dec 15 09:44:58 2009
Date: Tue, 15 Dec 2009 09:43:47 -0500
From: Tim Wilde <twilde@cymru.com>
To: William Pitcock <nenolod@systeminplace.net>
In-Reply-To: <1260854303.6328.36.camel@petrie>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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On 12/15/2009 12:18 AM, William Pitcock wrote:
>> http://asn.cymru.com/
>
> Looks like their WHOIS server in verbose mode will do the trick for what
> I want, as it provides predictable output. Thank you.
For the record, the prefix you find here will be the prefix our BGP view
(from peers around the globe) sees that IP announced as, which is not
necessarily the same as the RIR allocated prefix. And you can find full
details of all of the access methods for this service here:
http://www.team-cymru.org/Services/ip-to-asn.html
Please make note of the notice at the top of the page regarding use in
software, applications, and devices - if we have advance notice we can
make sure we're not going to accidentally block you or your users, but
only if you get in touch with us first. :)
Thanks,
Tim Wilde
- --
Tim Wilde, Senior Software Engineer, Team Cymru, Inc.
twilde@cymru.com | +1-630-230-5433 | http://www.team-cymru.org/
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