Robtex

Up: 117.4.244.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 117.4.245.0/25
Down right: 117.4.245.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
117.4.245.3	PTR	localhost
117.4.245.10	PTR	localhost
117.4.245.25	PTR	localhost
117.4.245.34	PTR	localhost
117.4.245.50	PTR	localhost
117.4.245.59	PTR	localhost
117.4.245.75	PTR	localhost
117.4.245.88	PTR	localhost
117.4.245.90	PTR	localhost
117.4.245.114	PTR	localhost
117.4.245.124	PTR	localhost
117.4.245.124	A	pcdanphuong.com
117.4.245.133	PTR	localhost
117.4.245.135	PTR	localhost
117.4.245.139	PTR	localhost
117.4.245.162	PTR	localhost
117.4.245.166	PTR	localhost
117.4.245.186	PTR	localhost
117.4.245.196	PTR	localhost
117.4.245.230	PTR	localhost
117.4.245.232	PTR	localhost
117.4.245.238	PTR	localhost
117.4.245.238	A	mail.khanghai.com
117.4.245.238	A	mail.sieuthimebe24h.com