This might be useful:
http://www.team-cymru.org/Services/ip-to-asn.html
I've used the DNS service to do a few thousand lookups but for a million
request you probably want to use the "bulk whois" service.
On Mon, 25 Feb 2013, Andrew Hume wrote:
i am asking this for a friend who needs to remain unidentified.
she needs to get whois type information for approx 1M ip addresses in teh US.
she can, and has, just simply bang out the queries but by observation,
one's ip address will get blacklisted if the query rate exceeds 1000 or so per
day.
apart from the ethically dubious technique of renting amazon servers and using
them until they get blacklisted, is there any better way to get this information
quicker? like a commercial service? we expect the data changes slowly, so
month or 3 old data would likely be fine.
--
Simon Lyall | Very Busy | Web: http://www.darkmere.gen.nz/
"To stay awake all night adds a day to your life" - Stilgar | eMT.
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