Robtex

Up: 3.172.0.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 3.172.0.0/20
Down right: 3.172.16.0/20

IP	Type	Hostname
3.172.0.0	PTR	n003-000-000-000.static.ge.com
3.172.0.34	PTR	n003-000-000-000.static.ge.com
3.172.0.67	PTR	n003-000-000-000.static.ge.com
3.172.0.98	PTR	n003-000-000-000.static.ge.com
3.172.0.99	PTR	n003-000-000-000.static.ge.com
3.172.0.160	PTR	n003-000-000-000.static.ge.com
3.172.0.163	PTR	n003-000-000-000.static.ge.com
3.172.0.192	PTR	n003-000-000-000.static.ge.com
3.172.0.194	PTR	n003-000-000-000.static.ge.com
3.172.0.224	PTR	n003-000-000-000.static.ge.com
3.172.1.8	PTR	n003-000-000-000.static.ge.com
3.172.2.2	PTR	n003-000-000-000.static.ge.com
3.172.17.2	PTR	n003-000-000-000.static.ge.com
3.172.27.214	PTR	n003-000-000-000.static.ge.com