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: 217.9.49.20
Hostname: *.drv-nord.de (invalid hostname)
Hostname: www.drv-bund.de
Hostname: begutachtung-drv.de
Hostname: rehazubis.de
Hostname: rentenupdate.drv-bund.de
Hostname: drv-nord.de