Name servers

[Dave Warren]

Is it possible to get a listing of all the domains (Regardless of registrar)
that rely on ns3.devilsplayground.net as a name server?

The box in question has had an unfortunate explosion, and will not be
replaced, so I need to move all domains back to ns1 and ns2 exclusively.
I've submitted the changes to OpenSRS, register.com and NetSol for all the
domains that I know about, but I have a feeling I am missing at least a
couple.  More importantly, in the domain management toolkit, it doesn't give
me the option to delete ns3, I assume this means there are still domains
that rely on it?

Thanks in advance.