Robtex

Up: 117.0.0.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 117.0.8.0/22
Down right: 117.0.12.0/22

IP	Type	Hostname
117.0.8.2	PTR	localhost
117.0.8.113	PTR	localhost
117.0.8.123	PTR	localhost
117.0.8.155	PTR	localhost
117.0.8.201	PTR	localhost
117.0.8.210	PTR	localhost
117.0.8.227	PTR	localhost
117.0.8.234	PTR	localhost
117.0.8.251	PTR	localhost
117.0.9.2	PTR	localhost
117.0.9.89	PTR	localhost
117.0.9.152	PTR	localhost
117.0.11.88	PTR	localhost
117.0.11.121	PTR	localhost
117.0.13.2	PTR	localhost
117.0.13.8	PTR	localhost
117.0.13.10	PTR	localhost
117.0.13.25	PTR	localhost
117.0.13.26	PTR	localhost
117.0.13.40	PTR	localhost
117.0.13.42	PTR	localhost
117.0.13.57	PTR	localhost
117.0.13.64	PTR	localhost
117.0.13.72	PTR	localhost
117.0.13.75	PTR	localhost
117.0.13.80	PTR	localhost
117.0.13.81	PTR	localhost
117.0.13.82	PTR	localhost
117.0.13.83	PTR	localhost
117.0.13.97	PTR	localhost
117.0.13.98	PTR	localhost
117.0.13.121	PTR	localhost
117.0.13.122	PTR	localhost
117.0.13.152	PTR	localhost
117.0.13.160	PTR	localhost
117.0.13.163	PTR	localhost
117.0.13.170	PTR	localhost
117.0.13.186	PTR	localhost
117.0.13.203	PTR	localhost
117.0.13.224	PTR	localhost
117.0.13.232	PTR	localhost
117.0.13.233	PTR	localhost
117.0.14.19	PTR	localhost
117.0.14.201	PTR	localhost