Robtex

Up: 117.4.192.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 117.4.192.0/22
Down right: 117.4.196.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
117.4.193.0	PTR	localhost
117.4.193.10	PTR	localhost
117.4.193.17	PTR	localhost
117.4.193.66	PTR	localhost
117.4.193.81	PTR	localhost
117.4.193.129	PTR	localhost
117.4.193.146	PTR	localhost
117.4.193.147	PTR	localhost
117.4.193.170	PTR	localhost
117.4.193.184	PTR	localhost
117.4.193.208	PTR	localhost
117.4.193.217	PTR	localhost
117.4.193.234	PTR	localhost
117.4.194.43	PTR	localhost
117.4.194.58	PTR	localhost
117.4.194.98	PTR	localhost
117.4.194.112	PTR	localhost
117.4.194.122	PTR	localhost
117.4.194.131	PTR	localhost
117.4.194.145	PTR	localhost
117.4.194.146	PTR	localhost
117.4.194.169	PTR	localhost
117.4.194.183	A	www.hoangvongtoc.com
117.4.194.183	A	giohien.com
117.4.194.183	A	hoangvongtoc.com
117.4.195.1	PTR	localhost
117.4.195.11	PTR	localhost
117.4.195.41	PTR	localhost
117.4.195.83	PTR	localhost
117.4.195.88	PTR	localhost
117.4.195.104	PTR	localhost
117.4.195.146	PTR	localhost
117.4.195.162	PTR	localhost
117.4.195.178	PTR	localhost
117.4.195.184	PTR	localhost
117.4.195.186	PTR	localhost
117.4.195.211	PTR	localhost
117.4.197.40	PTR	localhost
117.4.197.59	PTR	localhost
117.4.197.136	PTR	localhost
117.4.197.161	PTR	localhost
117.4.197.186	PTR	localhost
117.4.197.187	PTR	localhost
117.4.198.11	PTR	localhost
117.4.198.18	PTR	localhost
117.4.198.32	PTR	localhost
117.4.198.50	PTR	localhost
117.4.198.51	PTR	localhost
117.4.198.73	PTR	localhost
117.4.198.74	PTR	localhost
117.4.198.99	PTR	localhost
117.4.198.144	PTR	localhost
117.4.198.145	PTR	localhost
117.4.198.160	PTR	localhost
117.4.198.177	PTR	localhost
117.4.198.218	PTR	localhost
117.4.198.225	PTR	localhost