Robtex

Up: 123.203.172.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 123.203.172.0/25
Down right: 123.203.172.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
123.203.172.28	A+PTR	123203172028.ctinets.com
123.203.172.43	A	123203172043.ctinets.com
123.203.172.68	A	123203172068.ctinets.com
123.203.172.153	A+PTR	123203172153.ctinets.com
123.203.172.153	A	ericlam.org
123.203.172.159	A+PTR	123203172159.ctinets.com
123.203.172.159	A	mail.wannas.org
123.203.172.165	A	mail1.towatoland.com
123.203.172.165	A	mail1a.cheunghang.com
123.203.172.165	A	mail1.hinnosolutions.com
123.203.172.193	A+PTR	123203172193.ctinets.com
123.203.172.196	A+PTR	123203172196.ctinets.com
123.203.172.201	A	123203172201.ctinets.com
123.203.172.204	A	123203172204.ctinets.com
123.203.172.238	A	123203172238.ctinets.com
123.203.172.243	A+PTR	123203172243.ctinets.com
123.203.172.246	A	123203172246.ctinets.com
123.203.172.248	A	123203172248.ctinets.com