Robtex

Up: 103.23.12.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 103.23.12.0/25
Down right: 103.23.12.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
103.23.12.0	PTR	103-23-12-0.steadynet.jp
103.23.12.5	PTR	103-23-12-5.steadynet.jp
103.23.12.5	A	ns1.steadynet.jp
103.23.12.6	PTR	103-23-12-6.steadynet.jp
103.23.12.6	A	ns2.steadynet.jp
103.23.12.8	PTR	103-23-12-8.steadynet.jp
103.23.12.28	PTR	103-23-12-28.steadynet.jp
103.23.12.28	A	fly-high.org
103.23.12.28	A	reverpro.com
103.23.12.40	A	misuruta.net
103.23.12.67	A	misuruie.net
103.23.12.130	A	mail.zarra-1tsudemo.com
103.23.12.130	A	mail.a3vrm-aiai-51.com
103.23.12.130	A	mail.3ij2t-aiai-51.com
103.23.12.201	A	test-rchse.net
103.23.12.215	PTR	103-23-12-215.mb-draco.com
103.23.12.215	A	mou-karu.com
103.23.12.223	A	ns1.vmeauthns1.com
103.23.12.226	A	tensaisyudan.com
103.23.12.230	A	ns2.vmeauthns1.com
103.23.12.233	PTR	103-23-12-233.mb-draco.com
103.23.12.233	A	sup-test-cotns.net
103.23.12.233	A	test-cotns.net
103.23.12.238	A	system-oem.com
103.23.12.239	PTR	103-23-12-239.mb-draco.com
103.23.12.240	PTR	103-23-12-240.mb-draco.com
103.23.12.244	A	misuruns.net
103.23.12.248	PTR	103-23-12-248.steadynet.jp
103.23.12.248	A	ftprm.jp
103.23.12.249	PTR	103-23-12-249.steadynet.jp
103.23.12.249	A	spmd.luckl.jp
103.23.12.249	A	luckl.jp
103.23.12.250	A	neo-kanpekidaie.net
103.23.12.250	A	wndfl.jp
103.23.12.255	PTR	103-23-12-255.steadynet.jp