Robtex

Up: 117.2.64.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 117.2.80.0/21
Down right: 117.2.88.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
117.2.80.1	PTR	localhost
117.2.80.51	PTR	localhost
117.2.80.64	PTR	localhost
117.2.80.81	PTR	localhost
117.2.80.96	PTR	localhost
117.2.80.112	PTR	localhost
117.2.80.114	PTR	localhost
117.2.80.177	PTR	localhost
117.2.80.178	PTR	localhost
117.2.80.195	PTR	localhost
117.2.80.226	PTR	localhost
117.2.80.242	PTR	localhost
117.2.81.195	PTR	localhost
117.2.82.68	A	www.htbio.com.vn
117.2.82.68	A	truongchinhtrilamdong.com.vn
117.2.82.68	A	langbiang.gov.vn
117.2.82.129	PTR	localhost
117.2.82.178	PTR	localhost
117.2.82.179	PTR	localhost
117.2.82.208	PTR	localhost
117.2.84.143	PTR	localhost
117.2.85.129	PTR	localhost
117.2.85.208	PTR	localhost
117.2.85.211	PTR	localhost
117.2.86.2	PTR	localhost
117.2.86.65	PTR	localhost
117.2.86.81	PTR	localhost
117.2.86.112	PTR	localhost
117.2.86.146	PTR	localhost
117.2.86.179	PTR	localhost
117.2.86.195	PTR	localhost
117.2.86.224	PTR	localhost
117.2.88.41	PTR	localhost
117.2.88.41	A	daibieudancukontum.gov.vn
117.2.88.109	PTR	localhost
117.2.88.109	A	stnmt.kontum.gov.vn
117.2.91.51	PTR	localhost
117.2.93.0	PTR	localhost
117.2.93.19	PTR	localhost
117.2.93.32	PTR	localhost
117.2.93.81	PTR	localhost
117.2.93.97	PTR	localhost
117.2.93.114	PTR	localhost
117.2.93.128	PTR	localhost
117.2.93.129	PTR	localhost
117.2.93.147	PTR	localhost
117.2.93.161	PTR	localhost
117.2.93.163	PTR	localhost
117.2.93.176	PTR	localhost
117.2.93.178	PTR	localhost
117.2.93.179	PTR	localhost
117.2.93.192	PTR	localhost
117.2.93.194	PTR	localhost
117.2.93.208	PTR	localhost
117.2.93.211	PTR	localhost
117.2.93.225	PTR	localhost
117.2.93.240	PTR	localhost
117.2.93.241	PTR	localhost
117.2.93.242	PTR	localhost
117.2.94.33	PTR	localhost
117.2.94.245	PTR	localhost
117.2.95.130	PTR	localhost