Reverse DNS Lookup
This tool will provide you the hostname (ie www.yahoo.com) of the IP address that you enter below.
Results:
Lookup on IPv4 Address: 209.8.147.250
Hostname: redstone.com.cn
Hostname: redstone.hk
Hostname: mail.redstone.com.cn
Hostname: curiel.it
Hostname: curiel.redstone
Hostname: giada.com