[e2e] get the ASN (autonomous system number) to an IP-address

[spurlis at gmx.de]

Hallo!

I am a student at the institute of computer science (university of wuerzburg
- germany). I collected a number of different IP-addresses and i want to
group them by their according autonomous system number (ASN).  How can i get the
according ASN? I found some web interfaces where you can get the ASN to an
IP-address, but i have to check about 1000 addresses and so i need a script /
tool or something similar. 

Thank you!

Sebastian

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