DNS Problem: Help!

[Mike Diggins]

We're having an odd problem with one ISP whose customers make use of our
University network resources. The problem is that our name servers are
finding incorrect Authoritative name servers for the IP address in
question (actually a range of addresses beginning at 24.57.128.0 - not
their entire address space, just part of it). The IP address for their
name server NS.CGOCABLE.NET comes back as 24.226.1.11 which is wrong, it's
not even a name server. It should be 24.226.1.94! If I restart named it
sometimes picks up the correct address. I just restarted both my name
servers and find that they have, once again, an incorrect address.

I have no affiliation with this ISP, they won't return any of my calls and
they don't seem to be aware of a problem! Is there anyway this could be a
problem at our end? Is there anyway to find out who gave our name server
the incorrect data? Is there anyway to force our name servers to lookup
this information again without restarting named? Any help would be
appreciated.

diggins at myserver<local/named># nslookup
Default Server:  localhost
Address:  127.0.0.1

> set norecursive
> 24.57.131.72
Server:  localhost
Address:  127.0.0.1

Authoritative answers can be found from:
131.57.24.in-addr.arpa  nameserver = NS.CGOCABLE.NET
131.57.24.in-addr.arpa  nameserver = NS1.CGOCABLE.NET
NS.CGOCABLE.NET internet address = 24.226.1.11
NS1.CGOCABLE.NET        internet address = 24.226.1.20
*** No address (A) records available for 24.57.131.72