Robtex

Up: 123.202.120.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 123.202.120.0/23
Down right: 123.202.122.0/23

IP	Type	Hostname
123.202.120.41	A	123202120041.ctinets.com
123.202.120.51	A	123202120051.ctinets.com
123.202.120.89	A+PTR	123202120089.ctinets.com
123.202.120.120	A	123202120120.ctinets.com
123.202.120.155	PTR	123202120155.ctinets.com
123.202.120.185	A	123202120185.ctinets.com
123.202.120.187	A	3hworld.com
123.202.120.187	A	123202120187.ctinets.com
123.202.120.188	A	123202120188.ctinets.com
123.202.120.189	A+PTR	123202120189.ctinets.com
123.202.121.31	A+PTR	123202121031.ctinets.com
123.202.121.31	A	mail.digi.hk
123.202.121.31	A	ns.digi.hk
123.202.121.110	A	123202121110.ctinets.com
123.202.121.143	A+PTR	123202121143.ctinets.com
123.202.122.20	A	123202122020.ctinets.com
123.202.122.87	A	eldventure.com
123.202.122.99	A	123202122099.ctinets.com
123.202.122.105	A	lonesurgeon.asuscomm.com
123.202.122.147	A	123202122147.ctinets.com
123.202.122.152	A	123202122152.ctinets.com
123.202.122.165	A	123202122165.ctinets.com
123.202.122.180	A	123202122180.ctinets.com
123.202.122.187	A	hkonlinechkbn.sytes.net
123.202.122.233	A	123202122233.ctinets.com
123.202.122.249	A	123202122249.ctinets.com
123.202.123.21	A+PTR	123202123021.ctinets.com
123.202.123.27	A	tsuilai.com
123.202.123.31	A	123202123031.ctinets.com
123.202.123.33	A	123202123033.ctinets.com
123.202.123.37	A	123202123037.ctinets.com
123.202.123.61	PTR	123202123061.ctinets.com
123.202.123.85	PTR	123202123085.ctinets.com
123.202.123.85	A	x1.hk
123.202.123.96	A	123202123096.ctinets.com
123.202.123.121	A	123202123121.ctinets.com
123.202.123.189	A	dnsipcheck.no-ip.org
123.202.123.242	A	123202123242.ctinets.com
123.202.123.243	A	lonesurgeon.asuscomm.com