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Re: IP Range
From: Jason <security () brvenik com>
Date: Fri, 30 Aug 2002 10:40:55 -0400

One way is you could get the ASN then use some human cycles.

use any of the many public route servers available.

on a cisco you could try

sho ip bgp [dest netblock] <== the last ASN is the target below
sho ip bgp regexp [ASN] <== should show all routes services by that ASN.

and use contact correlation in arin/ripe/apnic whois for netblocks...


John Madden wrote:
Hello,

Where just about to begin a pentest engagement and the
client wants us to know if we can find out how many IP
blocks they have. Is there a way to find out all the
IP blocks of a company ? You've got the usual e-mail
domain name to find at least one but what if they have
2,3 + IP blocks ?

Any ideas ?

thanks
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