North American Network Operators Group
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Re: Mapping IP -> ASN

  • From: Avi Freedman
  • Date: Fri Nov 15 12:44:13 1996 
> Is there a tool available that will take an IP address and return the 
> ASN attached to that network? I've been in situations before where this 
> information would be useful, but not having access to the BGP routing 
> information I'm not sure how to do this? (I've looked around some 
> "likely" web sites - such as Merit - but haven't found anything.)
> 
> The pressing need is for the ASN associated with 198.161.92.0. This 
> network is connected to I*star, but I can't tell which of I*star's 
> three ASNs it's homed on. (And they aren't being responsive to queries.)
> 
> --lyndon

Telnet to route-server.cerf.net and type

sho ip bgp 198.161.92.0

Or go to nitrous.digex.net and select one of their viewers (mae-east,
pennsauken, mae-west); click on BGP; and enter 198.161.92.0 in the box...

Avi


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