Robtex

Up: 166.90.72.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 166.90.76.0/23
Down right: 166.90.78.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
166.90.76.1	A+PTR	lo0.er1.chicago.idcglobal.net
166.90.76.2	A+PTR	lo0.er2.chicago.idcglobal.net
166.90.76.3	A+PTR	chg717gw.idcglobal.net
166.90.76.5	A+PTR	atm-2-0-10.pe1.chi111.idcglobal.net
166.90.76.14	A+PTR	chgilcolo4-1-6509-5-1.idcglobal.net
166.90.76.35	A+PTR	ns1.idcglobal.net
166.90.76.37	A+PTR	ns2.idcglobal.net
166.90.76.62	A+PTR	faeth100core1.chicago.idcglobal.net
166.90.76.109	A	chgilcolo1-9.idcglobal.net
166.90.76.179	A	www.tradersaudio.com
166.90.76.183	PTR	womens-fitness.com
166.90.76.183	PTR	www.womens-fitness.com
166.90.76.188	PTR	vpn.toyodausa.com
166.90.77.1	A+PTR	noceast.idcglobal.net
166.90.77.3	A+PTR	wt.idcglobal.net
166.90.77.4	A+PTR	dcgw.idcglobal.net
166.90.77.6	A	host6.idcglobal.net
166.90.77.8	A+PTR	idclg1.idcglobal.net
166.90.77.10	A	idcnts3.idcglobal.net
166.90.77.14	A	idcmgt2.idcglobal.net
166.90.77.17	A+PTR	ntpst1.idcglobal.net
166.90.77.20	A+PTR	idcnt2ln.idcglobal.net
166.90.77.21	PTR	ftp.nicasa.org
166.90.77.26	PTR	nicasa.org
166.90.77.26	PTR	mail.nicasa.org
166.90.77.32	A+PTR	mail4.idcglobal.net
166.90.77.32	A	mail1.idcglobal.net
166.90.77.32	A	z1.idcglobal.net
166.90.77.34	A	mail.trailmasterinc.com
166.90.77.35	PTR	isp.idcglobal.net
166.90.77.40	A	web5.idcglobal.net
166.90.77.43	PTR	gtexonline.com
166.90.77.43	PTR	www.gtexonline.com
166.90.77.45	PTR	asgachicago.org
166.90.77.45	PTR	www.asgachicago.org
166.90.77.48	PTR	rmk.com
166.90.77.48	PTR	www.rmk.com
166.90.77.49	PTR	interoceanfinancial.com
166.90.77.55	PTR	us-markets.com
166.90.77.55	PTR	www.us-markets.com
166.90.77.57	PTR	trailmasterinc.com
166.90.77.57	PTR	www.switchgear1.com
166.90.77.57	PTR	www.trailmasterinc.com
166.90.77.60	PTR	www.redoaks.com
166.90.77.61	PTR	markspcrepair.com
166.90.77.61	PTR	www.markspcrepair.com
166.90.77.98	A	www.enh.org
166.90.77.98	A	www.northshore.org
166.90.77.98	A	enh.org
166.90.77.107	A	www.tmsupply.com
166.90.77.107	A	tmsupply.com
166.90.77.107	A	68-72-66-18.tmsupply.com
166.90.77.108	A+PTR	allstateappraisal.net
166.90.77.108	A	www.allstateappraisal.net
166.90.77.109	A	steelworkerforthefuture.com
166.90.77.109	A	usa.arcelormittal.com
166.90.77.110	PTR	sibley.adagetech.com
166.90.77.112	PTR	webmail.judsonu.edu
166.90.77.112	A	judsonu.edu
166.90.77.114	PTR	willowbrook.adagetech.com
166.90.77.114	A	midtronicsstationarypower.com
166.90.77.114	A	stationarypower.co
166.90.77.118	A	gypsycaravan-stl.org
166.90.77.118	A	symphonyvolunteer.org
166.90.77.118	A	powellhall.com
166.90.77.121	A	www.cerritoscenter.com
166.90.77.121	A	cerritoscenter.com
166.90.77.123	PTR	silverpop.com
166.90.77.125	PTR	cso.org
166.90.77.125	A	*.cso.org
166.90.77.125	A	chicagosymphony.org
166.90.77.138	A	ppmsuitex.com
166.90.77.149	A	llemenager.com
166.90.77.152	A	mistyle.com
166.90.77.153	A	abbottrewardsunleashed.com
166.90.77.163	A+PTR	proxy.marketinginnovators.com
166.90.77.163	A	proxy.us-marketinginnovators.com
166.90.77.173	A	yayyouawards.com
166.90.77.175	A	sso.ppmsuite.com
166.90.77.180	PTR	proxy.mktinn.com
166.90.77.181	A	hyundaiclaimcenter.com
166.90.77.185	A	hyundairewardscenter.com
166.90.77.186	A	firstniagararewards.com
166.90.77.187	A	charged-up.net
166.90.77.188	A	awardsunleashed.com
166.90.77.226	PTR	us-markets.com
166.90.77.226	PTR	usm1.us-markets.com
166.90.78.35	PTR	stchi2.idcglobal.net
166.90.78.59	A	exchange.pcipr.com
166.90.78.68	PTR	mboffice.com
166.90.78.68	PTR	spock.mboffice.com
166.90.78.104	A	mail.drakoncapital.com
166.90.78.104	A	mail.tmfuturesllc.com
166.90.78.104	A	mail.trademonstergroup.com
166.90.78.108	PTR	www.trademonster.com
166.90.78.108	A	trademonstergroup.com
166.90.78.202	A	emm.bestoptionbrokerage.com
166.90.78.213	A	mail.optionmonster-news.com
166.90.78.217	A	www.optionmonster.com
166.90.78.225	A	chgilcolo2-2-1.idcglobal.net
166.90.78.241	A	www.grouplive.com
166.90.78.241	A	dysanalytics.com
166.90.78.244	A	mail.chicago.grouplive.com
166.90.78.251	A+PTR	attackmarketing.com
166.90.78.251	A	www.attackmarketing.net
166.90.78.251	A	www.attackmarketing.com
166.90.78.254	A	experientialmarketing.org
166.90.78.254	A	attacktalent.com
166.90.79.3	PTR	sharedimaging.com
166.90.79.3	PTR	shared01.sharedimaging.com
166.90.79.26	PTR	ajrintl.com
166.90.79.26	PTR	gmexchanges.com
166.90.79.26	PTR	www.ajrintl.com
166.90.79.33	A+PTR	ln1.idcglobal.net
166.90.79.83	A	bristolstation.com
166.90.79.83	A	firethorneapt.com
166.90.79.83	A	thechurchillapartments.com
166.90.79.85	PTR	moranmail1.moranandco.com
166.90.79.87	A	moranandcompany.com
166.90.79.94	PTR	mailbox.moranandco.com
166.90.79.106	PTR	napa3.arborresearch.com
166.90.79.115	PTR	sbs-chi.com
166.90.79.115	PTR	sbsworldwide-chicago.com
166.90.79.115	PTR	office.sbs-chi.com
166.90.79.146	PTR	gpclflush.com
166.90.79.146	PTR	mail.gpclflush.com
166.90.79.161	PTR	isetnews.com
166.90.79.163	A	omk.pcipr.com
166.90.79.166	PTR	ascpnewsroom.org
166.90.79.169	PTR	aaahcnewyork.org
166.90.79.175	A+PTR	msismarthome.org
166.90.79.177	PTR	mlanews.org
166.90.79.179	A	www.stateofscience.org
166.90.79.179	A	stateofscience.org
166.90.79.181	PTR	msiholidays.com
166.90.79.184	PTR	nationallungcancerpartnershipnews.org
166.90.79.185	A+PTR	zimmernews.com
166.90.79.189	PTR	www2.pcipr.com
166.90.79.200	PTR	red.cluefirst.net
166.90.79.255	PTR	bcast-166-90-79-192.cluefirst.net