Robtex

Up: 117.5.0.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 117.5.16.0/21
Down right: 117.5.24.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
117.5.16.2	PTR	localhost
117.5.21.2	PTR	localhost
117.5.22.0	PTR	localhost
117.5.22.1	PTR	localhost
117.5.22.2	PTR	localhost
117.5.22.33	PTR	localhost
117.5.22.50	PTR	localhost
117.5.22.83	PTR	localhost
117.5.22.112	PTR	localhost
117.5.22.114	PTR	localhost
117.5.22.153	A	mail.thegioimaybodam.net
117.5.22.153	A	navigarden.net
117.5.22.153	A	thietbichetao.com
117.5.22.194	PTR	localhost
117.5.22.211	PTR	localhost
117.5.22.254	A	navicrm.com
117.5.23.242	PTR	localhost
117.5.23.242	A	mail.aromagarden.net
117.5.24.3	PTR	localhost
117.5.24.19	PTR	localhost
117.5.24.33	PTR	localhost
117.5.24.34	PTR	localhost
117.5.24.67	PTR	localhost
117.5.24.81	PTR	localhost
117.5.24.112	PTR	localhost
117.5.24.115	PTR	localhost
117.5.24.130	PTR	localhost
117.5.24.160	PTR	localhost
117.5.24.163	PTR	localhost
117.5.24.179	PTR	localhost
117.5.24.193	PTR	localhost
117.5.24.211	PTR	localhost
117.5.26.2	PTR	localhost
117.5.27.2	PTR	localhost
117.5.27.240	PTR	localhost
117.5.28.34	PTR	localhost
117.5.28.67	PTR	localhost
117.5.28.96	PTR	localhost
117.5.28.98	PTR	localhost
117.5.28.112	PTR	localhost
117.5.28.115	PTR	localhost
117.5.28.130	PTR	localhost
117.5.28.145	PTR	localhost
117.5.28.147	PTR	localhost
117.5.28.162	PTR	localhost
117.5.28.163	PTR	localhost
117.5.28.178	PTR	localhost
117.5.28.192	PTR	localhost
117.5.28.195	PTR	localhost
117.5.30.115	PTR	localhost
117.5.31.16	PTR	localhost
117.5.31.19	PTR	localhost
117.5.31.34	PTR	localhost
117.5.31.67	PTR	localhost
117.5.31.80	PTR	localhost
117.5.31.115	PTR	localhost
117.5.31.130	PTR	localhost
117.5.31.131	PTR	localhost
117.5.31.161	PTR	localhost
117.5.31.177	PTR	localhost
117.5.31.208	PTR	localhost
117.5.31.243	PTR	localhost