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How can I get the Autonomous System Number (ASN) and Netblock Owner for an IP in C#?

Tags:

c#

.net

dns

I need to look up the ASN and Netblock owner for a specific IP in a .NET server app.

Is this info in the WhoIs data?

Thanks!

like image 347
Joon Avatar asked Jun 04 '10 16:06

Joon

1 Answers

Team Cymru has an IP address to ASN mapping service. Please be sure to follow their terms of service, though...

like image 123
Alnitak Avatar answered Oct 24 '22 04:10

Alnitak
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