Robtex

Up: 66.252.64.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 66.252.64.0/22
Down right: 66.252.68.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.252.64.34	PTR	mail.midwesttruck.com
66.252.64.34	A	spam.midwesttruck.com
66.252.64.39	A	motivegear.net
66.252.64.39	A	motivegear.com
66.252.64.39	A	motivegearperformance.net
66.252.64.50	A	mail.answersmediainc.com
66.252.64.51	PTR	mail.answersmediainc.com
66.252.64.51	A	mail.myagegage.com
66.252.64.51	A	mail.answerstv.com
66.252.64.53	A+PTR	mail1.answersmediainc.com
66.252.64.72	A	pclosercitywidetitle.com
66.252.64.83	A+PTR	mnamail.mayekawausa.com
66.252.64.85	PTR	mail.mycomir.com
66.252.64.85	A	mail.mayekawausa.com
66.252.64.91	A+PTR	mail.romaneinc.com
66.252.64.91	A	webmail.trufragrance.com
66.252.64.137	A	kolbitvweb.com
66.252.64.206	A+PTR	exchcolo.mayekawausa.com
66.252.64.243	PTR	vpn.equivoice.com
66.252.64.252	A	fax.equivoice.com
66.252.64.253	A	vpn.equivoice.com
66.252.64.254	A+PTR	nserv2.equivoice.com
66.252.64.254	A	ns2.equivoice.com
66.252.65.6	PTR	mail.satolabeling.com
66.252.65.6	A	dritoday.net
66.252.65.6	A	forthedefense.org
66.252.65.8	A	nfje.net
66.252.65.9	A	mailfilter2.satolabeling.com
66.252.65.11	A	www.satoprintconnect.com
66.252.65.13	A	www.dri.org
66.252.65.20	A	drieurope.org
66.252.65.22	A	inhousedefensequarterly.org
66.252.65.22	A	dricorporatecounsel.org
66.252.65.24	A+PTR	mail.satoamerica.com
66.252.65.41	A	mail.ezemrx-securetransport.com
66.252.65.41	A	direct.ezemrx-securetransport.com
66.252.65.41	A	smtp.ezemrx-securetransport.com
66.252.65.51	A	mail.ubbofficesuites.com
66.252.65.132	PTR	remote.executivesclub.org
66.252.66.20	A	hydrauk2.pbx.dls.net
66.252.66.21	PTR	mail.hydraforce.com
66.252.66.22	A	www.hydraforce.com
66.252.66.26	A+PTR	hydracucm.hydraforce.com
66.252.66.43	PTR	mail.sollitt.com
66.252.66.83	PTR	mail.equivoice.com
66.252.66.91	A+PTR	mail.jamesonsir.com
66.252.66.91	A	mail.jamesoncommercial.com
66.252.66.91	A	mail.jameson.com
66.252.66.94	A	fw.jameson.com
66.252.66.115	A	mx-66-252-66-115.illinois-grain.com
66.252.66.147	PTR	mx1.chisweet.com
66.252.66.147	A	mail.quality-ingredients.com
66.252.66.147	A	chicagosweetners.com
66.252.66.148	PTR	mail.chisweet.com
66.252.66.165	A	ilnet.tusc.com
66.252.66.166	A	exchange.tusc.com
66.252.66.167	A	mail.roltagmsdr.com
66.252.66.167	A	mail2.roltagmsdr.com
66.252.66.169	A	metricalley.com
66.252.66.169	A	singlequery.com
66.252.66.195	PTR	mail.rdnmfg.com
66.252.67.5	A+PTR	mail.amtamassage.org
66.252.67.21	A	mail.trufragrance.com
66.252.67.35	A	visitor155nwacker.com
66.252.67.61	A+PTR	filter.fvldlaw.com
66.252.67.61	A	mail.fvldlaw.com
66.252.67.61	A	smpt1.fvldlaw.com
66.252.67.63	PTR	filter.fvldlaw.com
66.252.67.81	A	hfmailfltr01.hydraforce.com
66.252.67.85	A	mail.hydraforce.com
66.252.67.98	A	ironport2.equivoice.com
66.252.67.100	A	ironport2.girlscoutsni.org
66.252.67.139	PTR	mail0.compmort.com
66.252.67.140	PTR	mail.compmort.com
66.252.67.164	A+PTR	owa.toyoink.com
66.252.67.165	A+PTR	mail.toyoink.com
66.252.67.165	A	toyo-exchange.toyoink.com
66.252.67.165	A	mail.toyoinkusa.com
66.252.67.194	PTR	fwl-chi-02.hfr.com
66.252.67.200	PTR	barracuda.hfr.com
66.252.67.203	A+PTR	mail.wrightlearning.com
66.252.67.203	A	wrightliving.com.1.arsmtp.com
66.252.67.211	A	hedgefundsource.net
66.252.67.211	A	hedgefundsource.org
66.252.67.211	A	hedgefundsource.com
66.252.67.214	A	exchange.arpac.com
66.252.68.53	A	mail.namcoarcade.com
66.252.68.85	PTR	mail.jkrug.com
66.252.69.3	PTR	mx04.spamslaughter.net
66.252.69.131	PTR	ts1.worldtrans-usa.com
66.252.69.132	PTR	mail.chb-inc.com
66.252.69.132	PTR	mail.industrialsiperassociation.com
66.252.69.132	PTR	mail.main115.com
66.252.69.186	A	mail.dialtube.com
66.252.69.194	A	vpn.finkl.com
66.252.69.195	A	apps.finkl.com
66.252.69.196	A+PTR	mail.finkl.com
66.252.69.197	A	finkl.org
66.252.69.200	A	finklsteel.com
66.252.69.200	A	finkl.com
66.252.69.200	A	finkl-steel.com
66.252.69.210	A	partners.finkl.com
66.252.69.211	A	partners-beta.finkl.com
66.252.69.212	A	secure.finkl.com
66.252.69.215	A	sb-gateway.com
66.252.69.230	A	secure.rtenergy.com
66.252.70.18	PTR	mail.oandkamerican.com
66.252.70.19	A+PTR	mail.oandkamerican.com
66.252.70.19	A	dommail01.oandkamerican.com
66.252.70.22	A	mail.oandkamerican.net
66.252.70.34	PTR	mail.grenzglier.com
66.252.70.66	A	access.tjbc.com
66.252.70.83	A+PTR	msexchange.pss-corp.com
66.252.70.91	A+PTR	spring.pss-corp.com
66.252.70.143	A	drkepic.com
66.252.70.145	A	healthvocabularies.com
66.252.70.145	A	imocodescout.com
66.252.70.145	A	imocodescout.net
66.252.70.146	A	www.ihealthsearch.com
66.252.70.150	PTR	smtp.imo-online.com
66.252.70.154	A	appmgmt.e-imo.com
66.252.70.169	A	sandbox.e-imo.com
66.252.70.188	A	imolicensing.e-imo.com
66.252.70.209	A	notification.e-imo.com
66.252.70.210	A+PTR	webmail2.imo-online.com
66.252.71.8	A	wachterville.com
66.252.71.24	A	www.wachterhealth.com
66.252.71.24	A	wodbucket.com
66.252.71.24	A	wachter.com
66.252.71.228	A+PTR	cube2.equivoice.com