$ whois -H 72.5.250.84
Internap Network Services PNAP-09-2004 (NET-72-5-0-0-1)
72.5.0.0 - 72.5.255.255
The Ultimate Game Server INAP-DAL-EXT1-[B]ULTIMATEGAME[/B]-9721 (NET-72-5-250-0-1)
72.5.250.0 - 72.5.250.255