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: 128.227.9.75
Hostname: news.ufl.edu
Hostname: gatorlink.ufl.edu
Hostname: cyberbowl.security.ufl.edu
Hostname: virtual-l1www-prod-aq-publicssl.server.ufl.edu