Getting URL given IP address

Buddies i need to get the URL given an IP address(that is a reverse DNS lookup) i tried using InetAddress getHostName() method but its working for some IPs and for the rest its retruning the same IP as the output.Is there any alternate methods that solves this problem.If so plz inform me.......Thanks in advance

 

Well, for reverse dns lookup the dns server must have a reverse entry for that IP otherwise it'll return the IP. Read more http://en.wikipedia.org/wiki/Reverse_dns

 

Thank you dude....

ok is there any way to get the HTML of a webpage given the IP address.
I found all the URL class construtors take url as argument.

 

You can use CURL, read more http://en.wikipedia.org/wiki/CURL

 

Thank u dude.....