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: 63.239.240.97
Hostname: boi2-priv-10.inet.qwest.net
Hostname: 63-239-240-97.dia.static.qwest.net
Hostname: boi2-priv-12.inet.qwest.net