[6134] in North American Network Operators' Group
Re: Mapping IP -> ASN
daemon@ATHENA.MIT.EDU (Dun Liu)
Fri Nov 15 15:53:01 1996
Date: Fri, 15 Nov 1996 14:32:26 -0500 (EST)
From: Dun Liu <dunl@merit.edu>
To: Lyndon Nerenberg <lyndon@esys.ca>
cc: nanog@merit.edu
In-Reply-To: <SIMEON.9611151010.A15165@cezanne.esys.ca>
You can look at Internet routing table collected by Merit.
("http://compute.merit.edu/stats/mae-east/routing-table/"). But the table
may mislead you to a wrong ASN if the IP address is an inet-rtr. My
suggestion is consulting the table first, and if you think that one IP
might be a inet-rtr, consulting IRR using "whois -h whois.ra.net
'address'".
Dun
On Fri, 15 Nov 1996, Lyndon Nerenberg wrote:
> 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
>
>
>
