Robtex

Up: 204.13.0.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 204.13.0.0/22
Down right: 204.13.4.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
204.13.0.20	PTR	vlan293-20.digiport.us
204.13.0.58	PTR	static.digiport.com
204.13.0.62	PTR	static.digiport.com
204.13.0.100	A	fundacionrbd.org
204.13.0.106	PTR	mail.fostercarereview.org
204.13.0.109	PTR	static.digiport.com
204.13.0.227	PTR	ns1.concanon.net
204.13.0.227	A	ns1.wetsystems.com
204.13.0.228	PTR	ns2.concanon.net
204.13.0.230	A	www.justcobras.com
204.13.0.230	A	www.wetsystems.com
204.13.0.230	A	mail.wetsystems.com
204.13.0.232	PTR	taveuni.concanon.net
204.13.0.232	A	mail.worldofadventure.com
204.13.0.232	A	mail.intrepidgeek.com
204.13.0.233	A	mail.concanon.com
204.13.0.234	PTR	host234.concanon.net
204.13.0.250	A	test.concanon.net
204.13.0.251	PTR	host251.concanon.net
204.13.0.251	A	southbaystradingpost.com
204.13.0.251	A	southbaytradingpost.com
204.13.1.23	PTR	static.digiport.com
204.13.1.42	PTR	smtp.assurancemgmt.net
204.13.1.84	PTR	frell.cc
204.13.1.84	A	five-horizons.com
204.13.1.90	A	mail.lists.digiport.com
204.13.1.100	PTR	www.flexoffers.com
204.13.1.103	A	mail.24-7communications.net
204.13.1.103	A	24-7communications.net
204.13.1.103	A	ns1.24-7communications.net
204.13.1.122	PTR	achieveorgasms.com
204.13.1.122	A	ninjasmoker.com
204.13.1.123	A	ns1.buckmatch.com
204.13.1.124	A	ns2.buckmatch.com
204.13.1.125	A	*.buckmatch.com
204.13.1.131	A	estcustomers.com
204.13.1.131	A	itvcphone.com
204.13.1.202	PTR	u224-ikmultimedia-202.digiport.com
204.13.2.2	A+PTR	core01.net.digiport.com
204.13.2.3	A+PTR	0084-inetuplink.net.digiport.com
204.13.2.65	PTR	dns01.digiport.com
204.13.2.65	A	dns01.digiport.us
204.13.2.66	PTR	dns02.digiport.com
204.13.3.29	A	tvellas.org
204.13.3.34	PTR	mail.digiport.com
204.13.3.67	PTR	static.digiport.com
204.13.3.89	A+PTR	0074-guillermo.net.digiport.com
204.13.3.104	PTR	u289-brandsinstitute-104.digiport.com
204.13.3.104	A	brandpoll.com
204.13.3.181	PTR	srv04.voip.digiport.com
204.13.3.181	A	webtropic.com
204.13.3.181	A	*.fortknoxvault.com
204.13.3.189	A	mail.fortknoxvault.com
204.13.3.189	A	mail.singlejingles.com
204.13.3.189	A	mail.webtropic.com
204.13.3.231	A	mail.12tel.com
204.13.3.233	A	www.12tel.com
204.13.3.233	A	ns2.12tel.com
204.13.3.233	A	*.12tel.com
204.13.3.244	PTR	voip.eatonwolk.com
204.13.4.11	PTR	mail01.digiport.com
204.13.4.11	PTR	mail01.digiport.net
204.13.4.19	PTR	defiant.digiport.com
204.13.4.33	A+PTR	0053-westerndigitek.net.digiport.com
204.13.4.65	A	ptr-mailing.rednodo.com
204.13.4.74	A	ptr-server74.rednodo.com
204.13.4.76	PTR	mail76.rednodo.com
204.13.4.76	A	mail.eternallytrendy.com
204.13.4.76	A	mail.compramiami.com
204.13.4.124	PTR	a-124.activefilings.com
204.13.4.124	A	mail.activefilings.com
204.13.4.124	A	ns10.activefilings.com
204.13.4.125	A	americanfilings.com
204.13.4.125	A	activefilings.us
204.13.4.161	A+PTR	0079-morrispacific.net.digiport.com
204.13.4.173	A	condoblackbook.net
204.13.4.174	A	condobb.com
204.13.4.174	A	condoblackbook.com
204.13.4.174	A	usefulcrm.net
204.13.4.194	PTR	downtownmiami.com
204.13.4.194	A	playtodaycard.net
204.13.4.194	A	mail.cmgnews.net
204.13.4.195	PTR	buymiami.biz
204.13.4.201	A+PTR	0089-pvg.net.digiport.com
204.13.4.203	A+PTR	mail.pvginsurance.com
204.13.4.203	A	inwoodgroup.com
204.13.4.209	A+PTR	0090-itpceaser.net.digiport.com
204.13.4.210	A	remote.darksidegames.com
204.13.4.217	A+PTR	0091-metropy.net.digiport.com
204.13.4.220	PTR	mail.fembi.com
204.13.4.233	A+PTR	0094-tr8.net.digiport.com
204.13.5.82	A	mail.mediquip-parts.com
204.13.5.85	A+PTR	mail.hosa.com
204.13.5.85	A	mail.miamiobgyns.net
204.13.5.85	A	mx01.hosa.com
204.13.5.185	PTR	mx.lf-mc.com
204.13.5.227	A	brightpc.com
204.13.6.68	A	smtp2.bbsector.net
204.13.6.68	A	mail.mpbox.com
204.13.6.68	A	mpbox.com
204.13.6.90	PTR	colo.wadsworth-law.com
204.13.6.131	A	rscomputers.com
204.13.6.131	A	mail.rscomputers.com
204.13.6.132	PTR	mail.bannersupply.com
204.13.6.132	A	mail.shellow.com
204.13.6.132	A	shellow.com
204.13.6.136	A	thunderboltconverters.com
204.13.6.136	A	thunderboltmufflers.com
204.13.6.136	A	thunderboltexhaust.com
204.13.6.143	A	waterreclamation.com
204.13.6.212	PTR	mx.bestbuddies.com
204.13.6.212	PTR	mx.bestbuddies.org
204.13.7.98	A	mail.taurusmim.com
204.13.7.211	PTR	mail.wdpalaw.com
204.13.7.211	PTR	mail.wdbn.net