Robtex

Up: 117.4.128.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 117.4.160.0/20
Down right: 117.4.176.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
117.4.161.33	PTR	localhost
117.4.161.99	PTR	localhost
117.4.161.129	PTR	localhost
117.4.161.160	PTR	localhost
117.4.161.163	PTR	localhost
117.4.161.194	PTR	localhost
117.4.163.59	PTR	localhost
117.4.163.87	PTR	localhost
117.4.164.93	PTR	localhost
117.4.164.153	PTR	localhost
117.4.164.209	PTR	localhost
117.4.165.136	PTR	localhost
117.4.165.186	PTR	localhost
117.4.166.38	PTR	localhost
117.4.166.145	PTR	localhost
117.4.167.20	PTR	localhost
117.4.167.117	PTR	localhost
117.4.167.192	PTR	localhost
117.4.167.227	PTR	localhost
117.4.168.6	PTR	localhost
117.4.168.9	PTR	localhost
117.4.168.61	PTR	localhost
117.4.168.131	PTR	localhost
117.4.169.13	PTR	localhost
117.4.169.40	PTR	localhost
117.4.169.247	PTR	localhost
117.4.171.227	PTR	localhost
117.4.172.12	PTR	localhost
117.4.172.33	PTR	localhost
117.4.172.188	PTR	localhost
117.4.176.99	PTR	localhost
117.4.177.28	PTR	localhost
117.4.177.28	A	www.tbh.vn
117.4.177.40	PTR	localhost
117.4.177.198	PTR	localhost
117.4.179.121	A	www.sks100.vn
117.4.179.121	A	sks100.vn
117.4.180.33	PTR	localhost
117.4.180.97	PTR	localhost
117.4.181.64	PTR	localhost
117.4.181.129	PTR	localhost
117.4.182.64	PTR	localhost
117.4.182.83	A	thaibinhtourism.com.vn
117.4.182.83	A	cdvhntthaibinh.edu.vn
117.4.182.83	A	khuyennongthaibinh.vn
117.4.183.2	PTR	localhost
117.4.185.32	PTR	localhost
117.4.185.65	PTR	localhost
117.4.186.3	PTR	localhost
117.4.186.34	PTR	localhost
117.4.186.79	A	mail.benhvienninhbinh.vn
117.4.186.97	PTR	localhost
117.4.187.99	A	idesignbanking.com
117.4.190.64	PTR	localhost