[Tuncay]

DNS Lookup Tool,

DNS Lookup Tool

DNS Lookups & DNS Monitoring
Monitor your DNS server performance during a DNSlookup or reverse IP lookup.

[digital-angel]

Nice search, but you also have the dig command in linux which can do this from the shell probably with a lot more options. I you also troubleshoot with that command and monitor, so, but nice search there though.

[urf]

nslookup from a Windows command prompt can do much of the same too.