Robtex

Up: 64.104.128.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 64.104.128.0/20
Down right: 64.104.144.0/20

IP	Type	Hostname
64.104.128.234	A+PTR	esl-blr2-1-l.cisco.com
64.104.129.135	A+PTR	bgl04-acns-cr1.cisco.com
64.104.129.195	A	ind-iport-1.cisco.com
64.104.144.4	A+PTR	ic-test-01.cisco.com
64.104.155.132	A+PTR	bgl13-gem-fw1.cisco.com
64.104.155.134	A+PTR	bgl13-gem-ssl-gw1.cisco.com
64.104.155.148	A+PTR	bgl13-gem-fw1-outside.cisco.com
64.104.155.148	A	bgl-gem-auth.cisco.com