Robtex

Up: 103.12.192.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 103.12.192.0/23
Down right: 103.12.194.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
103.12.192.13	PTR	qcpl-13-192-12-103.qcplnet.com
103.12.192.13	A	mail.xpressomail.com
103.12.192.188	PTR	qcpl-188-192-12-103.qcplnet.com
103.12.192.237	PTR	qcpl-237-192-12-103.qcplnet.com
103.12.192.237	A	somauae.com
103.12.192.237	A	bansaricomposites.in
103.12.193.4	A	ns3.qcplnet.com
103.12.193.4	A	ns1.qcplnet.com
103.12.193.5	A+PTR	ns2.qcplnet.com
103.12.193.5	A	ns4.qcplnet.com
103.12.193.18	A+PTR	mailsrv.pntpl.com
103.12.193.18	A	emailsrv.pntpl.com
103.12.193.29	PTR	schmitten.co
103.12.193.29	A+PTR	mail.schmitten.co
103.12.193.29	PTR	emailsrv.rajhanscorp.com
103.12.193.30	A+PTR	mail.schmitten.co
103.12.193.30	A+PTR	mail.rajhans.co.in
103.12.193.30	A	mailsrvx.rajhanscorp.com
103.12.193.245	PTR	qcpl-245-193-12-103.qcplnet.com
103.12.195.18	A	mobicareskin.net
103.12.195.18	A	fiveota.com
103.12.195.18	A	www.fiveota.com
103.12.195.54	PTR	qcpl-54-195-12-103.qcplnet.com
103.12.195.54	A	hcloud9.com
103.12.195.97	PTR	qcpl-97-195-12-103.qcplnet.com
103.12.195.133	A	ecosense.co.in
103.12.195.147	PTR	qcpl-147-195-12-103.qcplnet.com
103.12.195.147	A	xpressomail.com
103.12.195.168	PTR	qcpl-168-195-12-103.qcplnet.com