Robtex

Up: 117.4.240.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 117.4.248.0/22
Down right: 117.4.252.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
117.4.248.1	PTR	localhost
117.4.248.24	PTR	localhost
117.4.248.26	PTR	localhost
117.4.248.50	PTR	localhost
117.4.248.75	PTR	localhost
117.4.248.80	PTR	localhost
117.4.248.96	PTR	localhost
117.4.248.123	PTR	localhost
117.4.248.147	PTR	localhost
117.4.248.194	PTR	localhost
117.4.248.202	PTR	localhost
117.4.248.235	PTR	localhost
117.4.248.242	PTR	localhost
117.4.248.249	PTR	localhost
117.4.249.77	A	cnvgroup.com.vn
117.4.250.11	PTR	localhost
117.4.250.17	PTR	localhost
117.4.250.39	A	biigate.com
117.4.250.39	A	kiotso1.com
117.4.250.65	PTR	localhost
117.4.250.89	PTR	localhost
117.4.250.106	PTR	localhost
117.4.250.107	PTR	localhost
117.4.250.123	PTR	localhost
117.4.250.136	PTR	localhost
117.4.250.195	PTR	localhost
117.4.250.210	PTR	localhost
117.4.250.234	PTR	localhost
117.4.251.26	PTR	localhost
117.4.251.58	PTR	localhost
117.4.251.58	A	thietbiluutruvagiaiphap.com
117.4.251.98	PTR	localhost
117.4.251.142	A	gmex.vn
117.4.251.250	PTR	localhost
117.4.251.250	A	macrocom.com.vn
117.4.252.2	PTR	localhost
117.4.252.11	PTR	localhost
117.4.252.18	PTR	localhost
117.4.252.25	PTR	localhost
117.4.252.32	PTR	localhost
117.4.252.34	PTR	localhost
117.4.252.51	PTR	localhost
117.4.252.67	PTR	localhost
117.4.252.72	PTR	localhost
117.4.252.98	PTR	localhost
117.4.252.130	PTR	localhost
117.4.252.139	PTR	localhost
117.4.252.139	A	gmex.vn
117.4.252.139	A	ato.vn
117.4.252.165	A	mx1.hoptackinhdoanh.vn
117.4.252.165	A	mx2.hoptackinhdoanh.vn
117.4.252.165	A	cloodo.com
117.4.252.192	PTR	localhost
117.4.252.193	PTR	localhost
117.4.252.216	PTR	localhost
117.4.252.250	PTR	localhost
117.4.253.18	PTR	localhost
117.4.253.26	PTR	localhost
117.4.253.48	PTR	localhost
117.4.253.66	PTR	localhost
117.4.253.67	PTR	localhost
117.4.253.80	PTR	localhost
117.4.253.81	PTR	localhost
117.4.253.96	PTR	localhost
117.4.253.128	PTR	localhost
117.4.253.138	PTR	localhost
117.4.253.139	PTR	localhost
117.4.253.171	PTR	localhost
117.4.253.176	PTR	localhost
117.4.253.179	PTR	localhost
117.4.253.203	PTR	localhost
117.4.254.8	PTR	localhost
117.4.254.24	PTR	localhost
117.4.254.32	PTR	localhost
117.4.254.66	PTR	localhost
117.4.254.74	PTR	localhost
117.4.254.80	PTR	localhost
117.4.254.81	PTR	localhost
117.4.254.91	PTR	localhost
117.4.254.114	PTR	localhost
117.4.254.123	PTR	localhost
117.4.254.162	PTR	localhost
117.4.254.211	PTR	localhost
117.4.254.216	PTR	localhost
117.4.254.224	PTR	localhost
117.4.254.227	PTR	localhost
117.4.254.240	PTR	localhost
117.4.255.57	PTR	localhost
117.4.255.57	A	futechshop.com
117.4.255.57	A	eazyerp.net
117.4.255.125	A	hotphet.com