I suggest doing something like: dig +trace -x 204.42.254.5
You can watch the delegation authority for the in-addr at each stage. - Jared On Jan 25, 2011, at 9:30 AM, Caleb Tennis wrote: > We have a /24 from one of our upstream providers that we handoff to a > customer. The /24 has been SWIPd to us, and we have nameservers setup with > ARIN against that record. > > Twice now this information has just "disappeared". That is, if do reverse > DNS lookups, they returns nothing, whereas they were just working fine > earlier. If you do an NS lookup on the block, it returns nothing. The /24 > blocks immediately surrounding us continue to work just fine. If we do a > lookup directly against our nameserver, it works just fine. > > It's like the nameserver information against that reverse DNS is just > magically gone. > > The ARIN record looks good, nothing has changed. Last time, our upstream > resubmitted the info so it would repopulate, and it started working again > soon there after. I admit to not being the smartest one with how these > records work: is the problem with the upstream, or ARIN's database, or is > there not enough information to tell? > > Thanks, > Caleb
