[c-nsp] Which IP's belong to AS1234?

[Ronan Mullally]

Hi Andy,

On Fri, 25 Sep 2009, Andy Saykao wrote:

> This is why I needed to know what IP blocks belong to AS1234, so I could
> find out how much traffic was actually coming from AS1234 on our
> Internet link.

Some (possibly all?) Whois servers can provide you with this information
with:

 whois -h whois.ripe.net -i origin AS1234

 % Information related to '194.110.40.0/23AS1234'

 route:        194.110.40.0/23
 descr:        Imatran Voima Corporation
 descr:        EUnet-FI aggregate
 origin:       AS1234
 mnt-by:       AS790-MNT
 source:       RIPE # Filtered

 % Information related to '194.110.44.0/23AS1234'

 route:        194.110.44.0/23
 descr:        Carelcomp Power
 descr:        EUnet-FI aggregate
 origin:       AS1234
 mnt-by:       AS790-MNT
 source:       RIPE # Filtered

 % Information related to '193.110.32.0/21AS1234'

 route:        193.110.32.0/21
 descr:        Fortum
 origin:       AS1234
 mnt-by:       TE-ENERGY-NOC
 source:       RIPE # Filtered

(an inverse query looking for objects with an origin of AS1234).

I don't know how definitive it is - I've queried several large AS and got
nothing back.  It may be this functionality is only available in the RIPE
whois server.  There's also no guarantee the results are going to be
current or accurate.


-Ronan