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: 216.58.212.174
Hostname: ams15s22-in-f14.1e100.net
Hostname: ams15s22-in-f174.1e100.net
Hostname: fra24s01-in-f14.1e100.net