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: 198.17.40.13
Hostname: www.ursinusgrizzly.com
Hostname: ursinusgrizzly.com
Hostname: grizzly.ursinusgrizzly.com
Hostname: ursinus.ursinusgrizzly.com