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Migrated from Server A to Server B from different providers, with different IP's for hostname, nameservers, etc. I've updated the nameservers for a number of domains, and they seem to be propagating, resolving, etc... for a short period of time, and then later, it looks like some of the domains have "jumped" back to the old nameservers...

Any idea what might be causing this? Solutions?

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There are two possibilities:

  1. Your nameservers aren't configured correctly.
  2. The domain registrars aren't recognising the new nameservers and reverting to the old ones.
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Websites do load on the new server... Is there such a thing as a temporary misconfiguration? o.O – inac Jun 28 '10 at 1:22
It's not a matter of whether websites load, it is a matter of whether the root dns servers say that your new domain servers are authorative for that domain. You can use an online tool such as network-tools.com to determine what the rest of the internet thinks your websites should resolve to – Matt Delves Jun 28 '10 at 1:46
The other option, is that you forgot to increment the serial when updating the nameservers. – Matt Delves Jun 28 '10 at 1:49
Some registrars like Dotster require an extra step to sort of "register" a new nameserver into their system for your domain besides just changing it on the at-face webUI for the WHOIS record, this caught me once. – troyengel Jun 28 '10 at 5:56
At this point, I believe it might be a registrar discrepancy... I notice the godaddy domains don't have this problem, but the netfirms do... serverfault.com/questions/155432/… – inac Jun 28 '10 at 7:20
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