Robtex

Up: 72.20.0.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 72.20.8.0/22
Down right: 72.20.12.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.20.8.3	PTR
72.20.8.9	PTR
72.20.8.10	PTR	72.20.8.10.staminus.net
72.20.8.10	A	asata.com
72.20.8.12	A	news.riau.go.id
72.20.8.13	A	primary-ip.blankonlinux.or.id
72.20.8.33	PTR	xxxshell.com
72.20.8.34	PTR	xxxxxxxxxxxxxxxxxxxxx.xxx
72.20.8.35	A+PTR	human.bein.gs
72.20.8.37	A	switch.blade.nu
72.20.8.39	A	honda.civic.tc
72.20.8.40	A	am.blade.nu
72.20.8.41	A	seriously.whyy.me
72.20.8.42	A	strippers.danceon.me
72.20.8.65	PTR
72.20.8.89	PTR
72.20.8.89	A	amzserver.net
72.20.8.161	PTR
72.20.8.161	A	antalyainternetcafe.com
72.20.8.162	PTR
72.20.9.5	A	mail.photoromp.com
72.20.9.5	A	mybestfriendsarepets.com
72.20.9.5	A	biglistbuilder.com
72.20.9.33	PTR
72.20.9.34	PTR
72.20.9.40	PTR
72.20.9.42	PTR
72.20.9.118	A	atozfuny.com
72.20.9.170	PTR
72.20.9.186	PTR	72.20.9.186.staminus.net
72.20.9.186	A	ns-canada.vedova.net
72.20.9.193	PTR
72.20.9.194	PTR
72.20.9.199	A	last-chance-gamers.net
72.20.9.200	PTR
72.20.9.203	PTR
72.20.9.209	A	ns1.ebusinesscomplete.com
72.20.9.209	A	mail.ebusinesscomplete.com
72.20.10.1	PTR	r
72.20.10.1	A	bloggingunderground.com
72.20.10.1	A	shortestpath.us
72.20.10.2	PTR	r
72.20.10.3	PTR	a
72.20.10.4	PTR	y
72.20.10.9	PTR	dcdvdcollections.com
72.20.10.10	PTR
72.20.10.11	PTR
72.20.10.17	PTR
72.20.10.19	PTR
72.20.10.24	PTR
72.20.10.25	PTR	sohbetlive.com
72.20.10.26	PTR
72.20.10.27	PTR	sohbetlive.com
72.20.10.33	PTR	staff.tengkorak.org
72.20.10.33	A	irc.kampungchat.org
72.20.10.33	A	ns1.kcfm.org
72.20.10.34	PTR	stay.away.from.my.biz.tm
72.20.10.35	PTR	light.turned.to.dark.and.life.turned.to.evils.in
72.20.10.41	A+PTR	please.leave.ur.message.im.offline.lt
72.20.10.42	PTR	im.neither.a.drug.abuser.nor.sexual.abuser.eu
72.20.10.44	A	eccentric.madhacker.biz
72.20.10.46	A	mail.simplygroupuk.com
72.20.10.46	A	comin.soon.it
72.20.10.48	A+PTR	defeat.the.evils.in
72.20.10.49	PTR	delete.me.in.your.ignorelist.com
72.20.10.50	A	dont.take.what.is.mine.bz
72.20.10.51	A+PTR	all.your.base.are.belong.2.us.to
72.20.10.56	PTR	gua.punya.suka.se
72.20.10.58	A+PTR	macam.bagus.org
72.20.10.60	A	mafia.inc.gs
72.20.10.61	A	when.im.with.you.i.feel.so.secure.la
72.20.10.61	A	notorious.and.bad.mn
72.20.10.66	PTR
72.20.10.67	PTR
72.20.10.75	PTR
72.20.10.80	PTR
72.20.10.81	PTR
72.20.10.82	PTR
72.20.10.83	PTR
72.20.10.90	PTR
72.20.10.97	PTR
72.20.10.99	PTR
72.20.10.106	PTR
72.20.10.112	PTR
72.20.10.113	PTR
72.20.10.121	PTR
72.20.10.123	PTR
72.20.10.130	PTR
72.20.10.130	A	famamusic.virtuaserver.com.br
72.20.10.131	A	mortari.virtuaserver.com.br
72.20.10.133	A	secrett.virtuaserver.com.br
72.20.10.133	A	maicon.virtuaserver.com.br
72.20.10.138	A	hunted.virtuaserver.com.br
72.20.10.138	A	bonifacio.virtuaserver.com.br
72.20.10.139	A	alekenji.virtuaserver.com.br
72.20.10.142	A	rubler.virtuaserver.com.br
72.20.10.144	A	shinoda.virtuaserver.com.br
72.20.10.147	A	k2server.virtuaserver.com.br
72.20.10.147	A	ns2.k2server.virtuaserver.com.br
72.20.10.147	A	sosbaladas.virtuaserver.com.br
72.20.10.155	A	ircbras.virtuaserver.com.br
72.20.10.156	A	angel.virtuaserver.com.br
72.20.10.161	PTR
72.20.10.161	A	famamusic2.virtuaserver.com.br
72.20.10.161	A	jabber-br.virtuaserver.com.br
72.20.10.162	A	ns1.azspower.virtuaserver.com.br
72.20.10.168	PTR	72.20.10.168.staminus.net
72.20.10.172	A	cesars.virtuaserver.com.br
72.20.10.172	A	jovita.virtuaserver.com.br
72.20.10.176	A	bonifacio5.virtuaserver.com.br
72.20.10.177	PTR
72.20.10.177	A	gnxpt.virtuaserver.com.br
72.20.10.182	A	garages.virtuaserver.com.br
72.20.10.186	A	bizup.virtuaserver.com.br
72.20.10.186	A	pedrohas.virtuaserver.com.br
72.20.10.188	A	kayroz.virtuaserver.com.br
72.20.10.195	PTR
72.20.10.198	A	massradiofollowsshining.us
72.20.10.198	A	masscivilhightimes.us
72.20.10.198	A	endcontrolfollowsstreet.us
72.20.10.200	PTR
72.20.10.200	A	forcesradiohomestreet.us
72.20.10.200	A	servicecontrolroadshining.us
72.20.10.202	PTR
72.20.10.211	PTR
72.20.10.216	PTR
72.20.10.218	PTR
72.20.10.224	PTR
72.20.10.225	PTR
72.20.10.232	PTR
72.20.10.240	PTR
72.20.10.243	PTR
72.20.10.248	PTR
72.20.10.249	PTR
72.20.10.249	A	*.av2.tv
72.20.10.249	A	ns1.av2.tv
72.20.10.250	PTR	72-20-10-250.sh0w.biz
72.20.11.1	PTR
72.20.11.1	A	frotta.com
72.20.11.1	A	timeprojects.com
72.20.11.3	PTR	pinoyshells.com
72.20.11.16	PTR
72.20.11.16	A	ctf247.com
72.20.11.17	PTR
72.20.11.27	PTR
72.20.11.27	A	betsrc.com
72.20.11.27	A	betsrc365.com
72.20.11.35	A	arthur.virtuaserver.com.br
72.20.11.36	A	kairo.virtuaserver.com.br
72.20.11.38	A	leomendes.virtuaserver.com.br
72.20.11.40	A	maumonte.virtuaserver.com.br
72.20.11.40	A	ipojur.virtuaserver.com.br
72.20.11.41	A	ns2.ne3.virtuaserver.com.br
72.20.11.41	A	tl2delta.virtuaserver.com.br
72.20.11.73	PTR
72.20.11.90	PTR
72.20.11.97	PTR
72.20.11.121	PTR
72.20.11.123	PTR	72.20.11.123.staminus.net
72.20.11.195	A	serverbh.virtuaserver.com.br
72.20.11.200	A	ns4.mexcorp.virtuaserver.com.br
72.20.11.200	A	mexcorp.virtuaserver.com.br
72.20.11.201	A	giliade.virtuaserver.com.br
72.20.11.202	A	ns1.shopgo.com.br
72.20.11.208	A	spiderin.virtuaserver.com.br
72.20.11.210	A	darkstill.virtuaserver.com.br
72.20.12.33	PTR	reseller.paiolhosting.net
72.20.12.33	A	ns11.ayns.net.20120907002451.deleted.gkg.net
72.20.12.33	A	ns1.maiochi.info
72.20.12.34	A	ns2.maiochi.info
72.20.12.34	A	ns2.skynetlanhouse.com
72.20.12.40	PTR
72.20.12.43	A	vps-customer-72-20-12-43.paiolhosting.com
72.20.12.45	A	vps-customer-72-20-12-45.paiolhosting.com
72.20.12.51	A	vps-customer-72-20-12-51.paiolhosting.com
72.20.12.57	A	vps-customer-72-20-12-57.paiolhosting.com
72.20.12.129	PTR
72.20.12.129	A	mail.articleunderground.com
72.20.12.129	A	mail.midimusicsoftware.com
72.20.12.130	PTR
72.20.12.145	PTR
72.20.12.145	A	90726.com
72.20.12.178	A	www.woool24.com
72.20.12.200	PTR
72.20.12.200	A	hourlystrategy.com
72.20.12.200	A	profitsquickfund.com
72.20.12.202	PTR
72.20.12.218	A	uiforum.uaeforum.org
72.20.13.2	PTR	observers.net
72.20.13.9	A	onegirl.violates.us
72.20.13.10	PTR	ubersource.net
72.20.13.13	A	irc.observers.net
72.20.13.26	A	ns1.observers.net
72.20.13.27	A	ns2.observers.net
72.20.13.28	A	ns3.observers.net
72.20.13.29	A	that.bitch.from.observers.net
72.20.13.35	PTR
72.20.13.38	A	doclothingchina.com
72.20.13.58	PTR
72.20.13.65	PTR
72.20.13.81	PTR	cp0.flashbyte.us
72.20.13.82	PTR	cp1.flashbyte.us
72.20.13.83	PTR	cp2.flashbyte.us
72.20.13.83	A	ns3.flashbyte.us
72.20.13.88	PTR	cp7.flashbyte.us
72.20.13.140	A	rl0.net
72.20.13.228	A	you.retard.cc
72.20.13.235	A	maximum.devis.tation.net
72.20.13.248	A	j00.me
72.20.14.1	PTR	bensumshell.net
72.20.14.1	A	mail.cryhmehook.us
72.20.14.1	A	cryhmehook.us
72.20.14.2	A	eur7.com
72.20.14.7	A	cqcshc.com
72.20.14.8	A	hktbf.com
72.20.14.12	A	mail.clan-club.dk
72.20.14.15	A	ccieunnumbered.org
72.20.14.16	PTR	bensumshell.net
72.20.14.17	PTR	bensumshell.net
72.20.14.17	A	yesgm.com
72.20.14.19	A	1ggj.com
72.20.14.20	A	029py.com
72.20.14.23	A	freshstartautosales.info
72.20.14.26	A	www.k846.com
72.20.14.27	A	880980.com
72.20.14.31	A	wc555.com
72.20.14.35	A	dzldkt.com
72.20.14.38	A	mail.eaglevision.dk
72.20.14.40	A	lblbn.com
72.20.14.44	A	bjkmsc.com
72.20.14.49	A	maiari.com
72.20.14.53	A	pjtxjd.com
72.20.14.56	A	seo560.com
72.20.14.57	PTR	bensumshell.net
72.20.14.57	A	sjkzi.com
72.20.14.58	PTR	bensumshell.net
72.20.14.58	A	sq518.com
72.20.14.62	A	netfxinvest.com
72.20.14.64	PTR	bensumshell.net
72.20.14.64	A	eastern-europe.biz
72.20.14.64	A	bjyakl.com
72.20.14.73	PTR	bensumshell.net
72.20.14.79	A	topys.org
72.20.14.82	PTR	bensumshell.net
72.20.14.82	A	hz8866.com
72.20.14.84	A	qili688.com
72.20.14.85	A	shyici.com
72.20.14.90	PTR	bensumshell.net
72.20.14.91	PTR	bensumshell.net
72.20.14.94	A	jjm100.com
72.20.14.97	PTR	bensumshell.net
72.20.14.98	PTR	bensumshell.net
72.20.14.99	PTR	bensumshell.net
72.20.14.99	A	tjycbxg.com
72.20.14.100	A	wanda17.com
72.20.14.100	A	elskar.tolvur.net
72.20.14.101	A	ptyzzz.com
72.20.14.105	A	linuxgods.speakz.org
72.20.14.106	PTR	bensumshell.net
72.20.14.106	A	rfc1459.speakz.org
72.20.14.107	PTR	bensumshell.net
72.20.14.107	A	jychh.com
72.20.14.109	A	intellectulaw.us
72.20.14.129	A	abuse.staminus.net
72.20.14.132	A	newartbet.com
72.20.14.132	A	facesbet7.com
72.20.14.132	A	facesbet5.com
72.20.14.137	PTR
72.20.14.138	PTR
72.20.14.139	PTR
72.20.14.170	PTR
72.20.14.170	A	te-dua.de
72.20.14.170	A	xn--uk-4ia.com
72.20.14.202	A	ra456.com
72.20.14.203	A	hg11222.com
72.20.14.204	A	hg11666.com
72.20.14.248	PTR
72.20.14.248	A	etc.durms.net
72.20.15.4	PTR
72.20.15.4	A	*.webccbill.com
72.20.15.4	A	webcardbill.com
72.20.15.19	PTR	pornographic.moviepost.net
72.20.15.33	PTR	server363.sekershell.com
72.20.15.34	PTR	server363.sekershell.com
72.20.15.35	PTR	server363.sekershell.com
72.20.15.41	A	wireless0day.ganjafarmer.net
72.20.15.41	A	11purse.com
72.20.15.50	PTR
72.20.15.50	A	pdns2.chrysalisnet.org
72.20.15.57	PTR
72.20.15.57	A	mizar.lod.com
72.20.15.59	PTR
72.20.15.61	A	ns5.sounds-familiar.com
72.20.15.61	A	bahh.in
72.20.15.61	A	ns3.soporteiso.com
72.20.15.65	PTR
72.20.15.120	PTR
72.20.15.121	PTR
72.20.15.129	PTR	safemod.net
72.20.15.130	PTR	safemod.net
72.20.15.131	PTR	safemod.net
72.20.15.136	PTR	safemod.net
72.20.15.137	PTR	safemod.net
72.20.15.138	PTR	safemod.net
72.20.15.139	PTR	safemod.net
72.20.15.242	A	klassrv.com