Looking for DNS reverse lookup service

[Kevin Darcy]

Dave Humes wrote:

>A few weeks ago I stumbled accross a for-fee service that claimed to provide
>all the names associated with an IP address rather than just the single name
>that you get with a typical nslookup reverse lookup.  
>
Oh, really? That's a rather extravagant claim. Can they find A records, 
pointing to Internet addresses, that I add to my *internal*, 
firewalled-off, unroutable DNS too? Even if the claim is limited to "DNS 
visible from the Internet", that's an awful lot of data to go through 
periodically, and the data would tend to get stale almost as soon as it 
was added to the database. Also, some folks use A records with encrypted 
or hashed names for various reasons, and don't allow zone transfers of 
their zones. How would this service find one of those, if the A record 
happened to point to the address of interest?

>Unfortunately, I
>forgot to bookmark the site and have now googled through about 20 pages
>without success.  Can anyone provide a referal for this service?
>
I seriously doubt this service is worth your time or money...

                                                                         
                              - Kevin