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I'm currently going through the logs on my apache install for potential intrustions, and I'm finding a lot of hits for SQL injections and exploit testing, from 173.212.195.* . I'm now trying to find out how I could find who owns the block of IPs which these IPs sit in?

I've looked at Wikipedia's list of assigned Class A netblocks, but I can only seem to find lists for non-regional and non-country lists. Can anyone tell me where I could find these lists?

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up vote 15 down vote accepted

That would be a WHOIS lookup

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The whois search for the IP at Whoisxy.com will provide the NetRange, CIDR, OriginAS and many more details along with the Abuse Email-id which will help in solving this problem.

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