the lookup tools in djbdns are handy for diagnosing ns problems like this.
see http://cr.yp.to/djbdns.html and http://cr.yp.to/djbdns/tools.html for
info on those.
for example, if i wanted to trace a possible path for resolving
216.148.218.195, i might start at a random root:
[tcl@jobo tcl]$ dn
internet network class queries work like domaine queries, it's just a bit
difficult to get the "registrar"
the easiest way to go is to use a proxy, like
"http://www.geektools.com/cgi-bin/proxy.cgi";
ask your question specifying the network in decimal dotted notation
for example, ask for 9.0.0.0
With regard to reverse nameservers, how do you work back up the
delegations to find out who is responsible for the class C, B, A ?
My reverse keeps dissapearing, but the nameserver responsible for it
gives the right answer, making me believe it is a higher level
nameserver that is misconfigured.