Sorry varun, not sure what exaclty you're looking for.
If you're looking for the domain name of an IP address, then that's called a reverse IP. You need to use a reverse IP tool to see what's the corresponding domaine name, the person it belongs to and their registrar. This can be useful in identifying a spammer who's sending you unwanted emails or maybe a computer trying to break into your firewall.
Use
The DNS Stuff tool, and enter the IP in the " Reverse DNS Lookup".
If that's not what you're looking for, then please re-phrase your question
