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IP to authoritative CIDR webservices
- Subject: IP to authoritative CIDR webservices
- From: nenolod at systeminplace.net (William Pitcock)
- Date: Mon, 14 Dec 2009 23:18:23 -0600
- In-reply-to: <[email protected]>
- References: <1260853078.6328.19.camel@petrie> <[email protected]>
Hi,
On Mon, 2009-12-14 at 21:12 -0800, Paul Ferguson wrote:
> On Mon, Dec 14, 2009 at 8:57 PM, William Pitcock
> <nenolod at 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/
Looks like their WHOIS server in verbose mode will do the trick for what
I want, as it provides predictable output. Thank you.
William