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: 147.72.252.240
Hostname: insights.sei.cmu.edu
Hostname: partner-application.sei.cmu.edu
Hostname: resources.sei.cmu.edu
Hostname: sei.cmu.edu
Hostname: www.sei.cmu.edu