Robtex

Up: 203.123.136.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 203.123.140.0/23
Down right: 203.123.142.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.123.140.70	PTR	mahinfin-140-70.static.pacific.net.in
203.123.140.70	A	mail.earnfromfixeddeposits.com
203.123.140.70	A	earnfromfixeddeposits.com
203.123.140.75	PTR	ziptel-140-75.static.pacific.net.in
203.123.140.77	A	mfdms.com
203.123.140.77	A	webmail.mahindrainsource.com
203.123.140.146	A+PTR	smtp1.plindia.com
203.123.140.146	A	www.plclients.com
203.123.140.146	A	plclients.com
203.123.140.149	PTR	ip-203-123-140-149.rev.asianetcom.net
203.123.140.149	A	mail.majorgainz.com
203.123.140.150	PTR	prabhudas-140-150.static.pacific.net.in
203.123.140.150	A	majorgainz.com
203.123.140.150	A	www.majorgainz.com
203.123.140.156	A	mail1.plindia.co.in
203.123.140.170	PTR	virplan-140-170.static.pacific.net.in
203.123.140.177	PTR	accel-140-177.static.pacific.net.in
203.123.140.215	A	mail2.kulhar.ro
203.123.140.215	A	happytoinsure.com
203.123.140.215	A	happytoinsure.in
203.123.140.216	PTR	lease216.mumbai-140.static.pacific.net.in
203.123.141.20	A	mail.cotecna.co.in
203.123.141.152	A	upganlawar.in
203.123.141.155	PTR	mail.verchaska.com
203.123.141.226	PTR	lease226.mumbai-141.pacific.net.in
203.123.141.226	A	ns1.bpwealth.net
203.123.141.232	PTR	lease232.mumbai-141.pacific.net.in
203.123.141.234	A	bpwealth.net
203.123.142.4	PTR	lease4.mumbai-142.static.pacific.net.in
203.123.142.8	PTR	lease8.mumbai-142.static.pacific.net.in
203.123.142.24	PTR	lease24.mumbai-142.static.pacific.net.in
203.123.142.29	PTR	lease29.mumbai-142.static.pacific.net.in
203.123.142.35	PTR	indviz-142-35.static.pacific.net.in
203.123.142.39	PTR	indviz-142-39.static.pacific.net.in
203.123.142.40	PTR	indviz-142-40.static.pacific.net.in
203.123.142.55	PTR	lease55.mumbai-142.static.pacific.net.in
203.123.142.58	PTR	lease58.mumbai-142.static.pacific.net.in
203.123.142.59	PTR	lease59.mumbai-142.static.pacific.net.in
203.123.142.67	PTR	lease67.mumbai-142.static.pacific.net.in
203.123.142.68	PTR	lease68.mumbai-142.static.pacific.net.in
203.123.142.69	PTR	lease69.mumbai-142.static.pacific.net.in
203.123.142.78	PTR	lease78.mumbai-142.static.pacific.net.in
203.123.142.85	PTR	lease85.mumbai-142.static.pacific.net.in
203.123.142.97	PTR	infinity-142-97.static.pacific.net.in
203.123.142.100	PTR	infinity-142-100.static.pacific.net.in
203.123.142.104	PTR	infinity-142-104.static.pacific.net.in
203.123.142.123	PTR	lease123.mumbai-142.static.pacific.net.in
203.123.142.130	PTR	labdhi-142-130.static.pacific.net.in
203.123.142.140	PTR	labdhi-142-140.static.pacific.net.in
203.123.142.145	PTR	lease145.mumbai-142.static.pacific.net.in
203.123.142.146	PTR	lease146.mumbai-142.static.pacific.net.in
203.123.142.152	PTR	lease152.mumbai-142.static.pacific.net.in
203.123.142.153	PTR	lease153.mumbai-142.static.pacific.net.in
203.123.142.155	PTR	lease155.mumbai-142.static.pacific.net.in
203.123.142.156	PTR	lease156.mumbai-142.static.pacific.net.in
203.123.142.158	PTR	lease158.mumbai-142.static.pacific.net.in
203.123.142.160	PTR	lease160.mumbai-142.static.pacific.net.in
203.123.142.166	PTR	techop-142-166.static.pacific.net.in
203.123.142.168	PTR	techop-142-168.static.pacific.net.in
203.123.142.171	PTR	techop-142-171.static.pacific.net.in
203.123.142.173	PTR	techop-142-173.static.pacific.net.in
203.123.142.180	PTR	lease180.mumbai-142.static.pacific.net.in
203.123.142.182	PTR	lease182.mumbai-142.static.pacific.net.in
203.123.142.186	PTR	lease186.mumbai-142.static.pacific.net.in
203.123.142.190	PTR	lease190.mumbai-142.static.pacific.net.in
203.123.142.194	PTR	ittilan-142-194.static.pacific.net.in
203.123.142.197	PTR	ittilan-142-197.static.pacific.net.in
203.123.142.198	PTR	ittilan-142-198.static.pacific.net.in
203.123.142.203	PTR	ittilan-142-203.static.pacific.net.in
203.123.142.204	PTR	ittilan-142-204.static.pacific.net.in
203.123.142.215	PTR	lease215.mumbai-142.static.pacific.net.in
203.123.142.219	PTR	lease219.mumbai-142.static.pacific.net.in
203.123.142.228	PTR	lease228.mumbai-142.static.pacific.net.in
203.123.142.231	PTR	lease231.mumbai-142.static.pacific.net.in
203.123.142.233	PTR	lease233.mumbai-142.static.pacific.net.in
203.123.142.240	PTR	lease240.mumbai-142.static.pacific.net.in
203.123.142.241	PTR	lease241.mumbai-142.static.pacific.net.in
203.123.142.243	PTR	lease243.mumbai-142.static.pacific.net.in
203.123.142.247	PTR	lease247.mumbai-142.static.pacific.net.in
203.123.142.248	PTR	lease248.mumbai-142.static.pacific.net.in
203.123.142.252	PTR	lease252.mumbai-142.static.pacific.net.in
203.123.143.19	PTR	lease19.mumbai-143.static.pacific.net.in
203.123.143.26	PTR	lease26.mumbai-143.static.pacific.net.in
203.123.143.34	A	mail1.hccindia.co.in
203.123.143.35	PTR	hcc-143-35.static.pacific.net.in
203.123.143.35	A	mail.hccindia.info
203.123.143.39	PTR	hcc-143-39.static.pacific.net.in
203.123.143.39	A	hccindia.biz
203.123.143.40	A	mail2.hccindia.co.in
203.123.143.44	PTR	hcc-143-44.static.pacific.net.in
203.123.143.44	A	hccindia.co.in
203.123.143.155	PTR	afconsindia.com
203.123.143.168	PTR	n-able.com
203.123.143.170	PTR	lease170.mumbai-143.static.pacific.net.in
203.123.143.170	A	mail.allieddigital.co.in
203.123.143.243	PTR	shapoorji.com
203.123.143.243	A	mail.shapoorji.com
203.123.143.245	PTR	lease245.mumbai-143.static.pacific.net.in
203.123.143.246	PTR	shapoorji.com
203.123.143.248	PTR	lease248.mumbai-143.static.pacific.net.in