Robtex

Up: 117.1.8.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 117.1.12.0/23
Down right: 117.1.14.0/23

IP	Type	Hostname
117.1.12.15	PTR	localhost
117.1.12.27	PTR	localhost
117.1.12.43	PTR	localhost
117.1.12.44	PTR	localhost
117.1.12.45	PTR	localhost
117.1.12.49	PTR	localhost
117.1.12.52	PTR	localhost
117.1.12.54	PTR	localhost
117.1.12.58	PTR	localhost
117.1.12.61	PTR	localhost
117.1.12.66	PTR	localhost
117.1.12.98	PTR	localhost
117.1.13.2	PTR	localhost
117.1.13.4	PTR	localhost
117.1.13.8	PTR	localhost
117.1.13.10	PTR	localhost
117.1.13.26	PTR	localhost
117.1.13.32	PTR	localhost
117.1.13.34	PTR	localhost
117.1.13.35	PTR	localhost
117.1.13.38	PTR	localhost
117.1.13.44	PTR	localhost
117.1.13.46	PTR	localhost
117.1.13.49	PTR	localhost
117.1.13.52	PTR	localhost
117.1.13.54	PTR	localhost
117.1.13.57	PTR	localhost
117.1.13.64	PTR	localhost
117.1.13.69	PTR	localhost
117.1.13.88	PTR	localhost
117.1.13.93	PTR	localhost
117.1.14.8	PTR	localhost
117.1.14.14	PTR	localhost
117.1.14.17	PTR	localhost
117.1.14.51	PTR	localhost
117.1.14.68	PTR	localhost
117.1.14.71	PTR	localhost
117.1.14.72	PTR	localhost
117.1.14.80	PTR	localhost
117.1.14.84	PTR	localhost
117.1.14.93	PTR	localhost
117.1.14.101	PTR	localhost
117.1.14.107	PTR	localhost
117.1.14.119	PTR	localhost
117.1.14.131	PTR	localhost
117.1.14.136	PTR	localhost
117.1.14.141	PTR	localhost
117.1.14.145	PTR	localhost
117.1.14.174	PTR	localhost
117.1.14.180	PTR	localhost
117.1.14.193	PTR	localhost
117.1.14.196	PTR	localhost
117.1.14.207	PTR	localhost
117.1.14.210	PTR	localhost
117.1.14.233	PTR	localhost
117.1.14.236	PTR	localhost
117.1.14.242	PTR	localhost
117.1.14.244	PTR	localhost