Robtex

Up: 203.128.6.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 203.128.6.0/25
Down right: 203.128.6.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.128.6.3	PTR	fip-6-3.brain.net.pk
203.128.6.3	A	sw-man1.brain.net.pk
203.128.6.4	PTR	fip-6-4.brain.net.pk
203.128.6.5	PTR	fip-6-5.brain.net.pk
203.128.6.5	A	core-sw3.brain.net.pk
203.128.6.12	PTR	ppa.com.pk
203.128.6.13	PTR	fip-6-11.brain.net.pk
203.128.6.13	A	sw-szh.brain.net.pk
203.128.6.17	PTR	fip-6-17.brain.net.pk
203.128.6.20	PTR	asw-hcp.brain.net.pk
203.128.6.20	A	sw-hcp.brain.net.pk
203.128.6.21	PTR	asw-stc2.brain.net.pk
203.128.6.21	A	sw-stc2.brain.net.pk
203.128.6.22	A	sw-nmt.brain.net.pk
203.128.6.27	PTR	fip-6-27.brain.net.pk
203.128.6.27	A	sw-cit.brain.net.pk
203.128.6.31	PTR	fip-6-31.brain.net.pk
203.128.6.35	PTR	fip-6-35.brain.net.pk
203.128.6.35	A	sw-lhc.brain.net.pk
203.128.6.37	PTR	203-128-6-37.brain.net.pk
203.128.6.37	A	sw-srv.brain.net.pk
203.128.6.40	PTR	pool1-203-128-6-40.brain.net.pk
203.128.6.40	A	sw-hcp6.brain.net.pk
203.128.6.47	PTR	fip-6-47.brain.net.pk
203.128.6.102	A	www.cakesandbakes.com
203.128.6.130	A+PTR	webscs01.brain.net.pk
203.128.6.130	A	cp.kapco.com.pk
203.128.6.131	PTR	websrs01.brain.net.pk
203.128.6.131	A	e-lawupdating.com
203.128.6.131	A	smtp.grundigsatellite.com
203.128.6.132	PTR	websrs02.brain.net.pk
203.128.6.132	A	smtp.siddiqtradecentre.com
203.128.6.132	A	smtp.wapdadip.com
203.128.6.133	PTR	websrs03.brain.net.pk
203.128.6.133	A	khushab.gop.pk
203.128.6.133	A	smtp.pakstocks.com.pk
203.128.6.134	PTR	websrs04.brain.net.pk
203.128.6.134	A	smtp.efspk.com
203.128.6.134	A	smtp.psrma.com
203.128.6.135	PTR	websrs05.brains.net
203.128.6.135	A	websrs05.brain.net.pk
203.128.6.150	A	blacktiger.brains.net
203.128.6.154	PTR	cp07.brain.net.pk
203.128.6.160	A	smtp.flaresms.pk
203.128.6.160	A	flaresms.pk
203.128.6.160	A	www.flaresms.pk
203.128.6.172	PTR	fip-6-172.brain.net.pk
203.128.6.172	A	shezan.com
203.128.6.180	PTR	fip-6-180.brain.net.pk
203.128.6.183	PTR	fip-6-183.brain.net.pk
203.128.6.184	PTR	fip-6-184.brain.net.pk
203.128.6.191	PTR	sehat.com.pk
203.128.6.191	A	www.fazaldins.com
203.128.6.191	A	fazaldinandsons.com
203.128.6.195	PTR	fip-6-195.brain.net.pk
203.128.6.195	A	smtp.tvnews.pk
203.128.6.197	PTR	pbte.edu.pk
203.128.6.200	A+PTR	webs01.brains.net
203.128.6.200	A	webs01.brain.net.pk
203.128.6.202	A+PTR	webs03.brains.net
203.128.6.202	A	webs03.brain.net.pk
203.128.6.202	A	brains.brains.net
203.128.6.203	A+PTR	pool1-203-128-6-203.brain.net.pk
203.128.6.203	A	techno.net.pk
203.128.6.203	A	smtp.techno.net.pk
203.128.6.210	PTR	fip-6-210.brain.net.pk
203.128.6.210	A	webs10.brains.net
203.128.6.217	A	webs17.brains.net
203.128.6.218	A	webs18.brains.net
203.128.6.220	A+PTR	dommx1.brain.net.pk
203.128.6.220	A	dommx1.brains.net
203.128.6.221	A+PTR	corpsmtp2.brain.net.pk
203.128.6.221	A	dommx2.brains.net
203.128.6.221	A	rsmtp.raaziq.com.pk
203.128.6.222	A+PTR	203-128-6-222.brain.net.pk
203.128.6.223	PTR	mail.tuvat.pk
203.128.6.224	PTR	203-128-6-224.brain.net.pk
203.128.6.224	A	cp.kapco.com.pk
203.128.6.224	A	techno.net.pk
203.128.6.225	PTR	cpanel2.brain.net.pk
203.128.6.225	A	smtp.edenhousing.com.pk
203.128.6.225	A	www.jumhooripublications.com
203.128.6.226	PTR	fip-6-226.brain.net.pk
203.128.6.226	A	xerite.com
203.128.6.226	A	mail.millatbatteries.com
203.128.6.231	A+PTR	websrs05.brain.net.pk
203.128.6.231	A	shezan.com
203.128.6.231	A	mail.siyanatech.com
203.128.6.232	A	websps02.brains.net
203.128.6.233	A	websps03.brains.net
203.128.6.234	A+PTR	websps04.brains.net
203.128.6.235	A+PTR	websps.brains.net
203.128.6.235	A	websps05.brains.net
203.128.6.236	A+PTR	websps.brains.net
203.128.6.237	A+PTR	websps.brains.net
203.128.6.241	PTR	203-128-6-241.brain.net.pk
203.128.6.241	A	smtp.tmanankana.com
203.128.6.241	A	smtp.tmasafdarabad.com
203.128.6.243	A	darearqamschools.edu.pk
203.128.6.244	PTR	fip-6-244.brain.net.pk
203.128.6.244	A	darearqamgujrat.edu.pk
203.128.6.250	PTR	pool1-203-128-6-250.brain.net.pk
203.128.6.250	A	movie.com.pk
203.128.6.250	A	smtp.movie.com.pk