Robtex

Up: 3.172.0.0/17
Can't show all results, try to descend to a more specific CIDR
Down left: 3.172.0.0/19
Down right: 3.172.32.0/19

IP	Type	Hostname
3.172.0.0	PTR	n003-000-000-000.static.ge.com
3.172.0.67	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
3.172.1.8	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
3.172.40.3	PTR	n003-000-000-000.static.ge.com
3.172.40.64	PTR	n003-000-000-000.static.ge.com
3.172.40.194	PTR	n003-000-000-000.static.ge.com