DNS look up against a specific DNS provider

[supermegatron at gmail.com (Jonathan Moore)]

On Thu, Jun 25, 2009 at 12:32 PM, Adrian Crenshaw<irongeek at irongeek.com> wrote:
> Does anyone know a way to specify a reverse DNS look up against a specific
> DNS provider? I don't want to use the DNS that is authoritive for? the given
> IP range. For example, look up all of the IPs at my org to see if any are
> mapped to some host name at DYNDNS? Some bot nets use these services for
> naming, so I thought this might be useful.

I may be misunderstanding, but both nslookup and dig let you specify
the server to query.  Using dig, adding @server.example.org to the
command tells dig to query only that server (IIRC).

 dig @ns1.everydns.net yahoo.com

HTH

-jonathan