Robtex

Up: 208.80.8.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 208.80.12.0/23
Down right: 208.80.14.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
208.80.12.4	PTR	sysone.comdef.net
208.80.12.7	PTR	mail.m2mail.us
208.80.12.7	A	m2mail.us
208.80.12.18	A	typhoonroadracingacademy.com
208.80.12.40	PTR	ftp.astronite.com
208.80.12.44	A	topistar.com
208.80.12.45	A	nsx.astronfortis.net
208.80.12.45	A	nsx.walveranta.org
208.80.12.46	PTR	colo-rdns.astronite.com
208.80.12.46	A	ca.astronfortis.com
208.80.12.48	PTR	reserved.astronfortis.com
208.80.12.48	A	timeflo.net
208.80.12.48	A	automagictools.com
208.80.12.49	PTR	colo-rdns.astronite.com
208.80.12.51	PTR	dfwhomeschoolers.com
208.80.12.58	PTR	unassigned.colo.astronite.com
208.80.12.60	PTR	unassigned.colo.astronite.com
208.80.12.98	A+PTR	envirogateway.net
208.80.12.98	A	largeoverhead.com
208.80.12.98	A	ns4.largeoverhead.com
208.80.12.100	PTR	satan.envirogateway.net
208.80.12.100	A	fallwiki.com
208.80.12.117	PTR	iraka.envirogateway.net
208.80.12.117	A	www.tierranativa.org
208.80.12.117	A	mail.balerossolis.com
208.80.12.119	PTR	lucia.xnet.mx
208.80.12.120	PTR	mariana.xnet.mx
208.80.12.120	A	www.promad.com.mx
208.80.12.120	A	viamail.com.mx
208.80.12.121	PTR	raul.xnet.mx
208.80.12.124	A+PTR	alma.xnet.mx
208.80.12.130	A	mail.enigmamail.net
208.80.12.162	PTR	training.hconlinesite.info
208.80.12.162	A	mailtomember.com
208.80.12.162	A	mail.mailtomember.com
208.80.12.166	PTR	training.hcsolutionservices.info
208.80.13.28	A	residentialtelephone.net
208.80.13.28	A	hostedpbxservice.net
208.80.13.28	A	voippeering.net
208.80.13.49	A+PTR	resi2-2.1-voip.com
208.80.13.51	A	mailedge2.vylmedia.com
208.80.13.51	A	mailedge.1-voip.com
208.80.13.52	A	mailedge2.vylmedia.com
208.80.13.52	A	mail.pbxrealtime.com
208.80.13.52	A	mail.didsupply.com
208.80.13.60	A	www.1-voip.com
208.80.13.82	A+PTR	resi-ct2.voipperformance.net
208.80.13.82	A	resi-mt2.voipperformance.net
208.80.13.82	A	resi-pt2.voipperformance.net
208.80.13.130	PTR	server.blue-quartz.co.uk
208.80.13.130	A	mail.names-server.net
208.80.13.130	A	mail.bethanjones.co.uk
208.80.13.148	A	getapplecarplay.com
208.80.13.148	A	carplaysiri.com
208.80.13.148	A	carplayenabled.com
208.80.13.150	PTR	enews-lapd.biodrought.com
208.80.13.162	A	vicky.hexted.com
208.80.13.174	PTR	s13.oviti12.com
208.80.13.174	A	dc-67b355132c24.lsd-cdn.com
208.80.13.178	PTR	s17.oviti12.com
208.80.13.178	A	potentialpack.com
208.80.13.183	A	radiusstick.net
208.80.13.195	PTR	server144.secure-access.net
208.80.13.195	A	graymatterent.com
208.80.13.195	A	mail.attstraining.com
208.80.13.196	PTR	server178.secure-access.net
208.80.13.196	A	mailscanner15.secure-access.net
208.80.13.196	A	mailscanner15.dnssys.com
208.80.13.197	PTR	server149.secure-access.net
208.80.13.199	PTR	server150.secure-access.net
208.80.13.200	A	agradio.org
208.80.13.200	A	mail.unfinishedfurnitureofwilmington.com
208.80.13.200	A	www.unfinishedfurnitureofwilmington.com
208.80.13.204	A	luv1another.com
208.80.13.204	A	mail.centuryfinancials.com
208.80.13.204	A	shaputer.com
208.80.13.206	PTR	server147.secure-access.net
208.80.13.207	PTR	cart7server.secure-access.net
208.80.13.208	A	mailscanner10.secure-access.net
208.80.13.208	A	mailscanner8.secure-access.net
208.80.13.208	A	mailscanner10.dnssys.com
208.80.13.209	A	awakensun.com
208.80.13.211	PTR	server148.secure-access.net
208.80.13.212	PTR	server105.secure-access.net
208.80.13.212	A	sagesbodycare.com
208.80.13.212	A	mail.castaliapub.com
208.80.13.215	PTR	server1017.secure-access.net
208.80.13.216	A	clientmatterconference.com
208.80.13.216	A	www.amishworkshops.com
208.80.13.216	A	www.gforceheli.com
208.80.13.217	PTR	server85.secure-access.net
208.80.13.218	PTR	server105.secure-access.net
208.80.13.219	PTR	ns2.dnssys.com
208.80.13.221	PTR	server101.secure-access.net
208.80.13.221	A	qualityscratchpromotions.com
208.80.13.221	A	catherinetaddo.com
208.80.13.227	A+PTR	host2.pcandnets.com
208.80.13.227	A	ns2.pcandnets.com
208.80.13.227	A	thetreergroup.net
208.80.13.247	A	ingram.me
208.80.13.247	A	trekzilla.com
208.80.13.247	A	lvlon.com
208.80.13.248	A	zimbraserver.lvlon.com
208.80.13.249	A	runbar.com
208.80.14.44	A+PTR	ns2.virtbiz.net
208.80.14.45	A+PTR	mxbackup01.virtbiz.com
208.80.14.46	A+PTR	ns4.virtbiz.com
208.80.14.115	PTR	115.14.80.208.in-addr.arpa.virtbiz.com
208.80.14.116	PTR	115.14.80.208.in-addr.arpa.virtbiz.com
208.80.14.116	A	ns3.websitemasters.com
208.80.15.10	PTR	dal1-brdr1.virtbiz.com
208.80.15.50	A	woodstock.virtbiz.com
208.80.15.54	A+PTR	mailscanner.virtbiz.com
208.80.15.58	A	stats.virtbiz.com
208.80.15.74	PTR	ns3.virtbiz.com
208.80.15.156	PTR	dal1-airfiber1.virtbiz.com
208.80.15.245	A+PTR	announce.virtbiz.com