IP to authoritative CIDR webservices
morrowc.lists at gmail.com
Wed Dec 16 22:25:56 CST 2009
On Tue, Dec 15, 2009 at 12:18 AM, William Pitcock
<nenolod at systeminplace.net> wrote:
> 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.
>> 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:
> Looks like their WHOIS server in verbose mode will do the trick for what
> I want, as it provides predictable output. Thank you.
there's also the lightish weight routeviews DNS zone data:
$ host -W 6 -R 10 -t txt 184.108.40.206.asn.routeviews.org
220.127.116.11.asn.routeviews.org descriptive text "9" "18.104.22.168" "16"
22.214.171.124 lives in 126.96.36.199/16 from ASN9
(thanks to joe/joel/dmm and capitan kemp)
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