Robtex

Up: 74.121.64.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 74.121.64.0/23
Down right: 74.121.66.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
74.121.64.4	A	webmaster.ntghosting.com
74.121.64.5	A+PTR	exchange.nexustechgroup.com
74.121.64.6	A	pe.nexustechgroup.com
74.121.64.6	A	preventivedge.nexustechgroup.com
74.121.64.10	A+PTR	smtp2.ntghosting.com
74.121.64.13	A	mx1.ntghosting.com
74.121.64.15	A+PTR	mx2.ntghosting.com
74.121.64.15	A	ns2.ntghosting.com
74.121.64.15	A	ns2.maildesk.net
74.121.64.25	A	ns1.maildesk.net
74.121.64.25	A	ns1.ntghosting.com
74.121.64.34	A	mail.cosadocs.com
74.121.64.40	A	mail.neohioeye.com
74.121.64.42	A+PTR	securemail.nexuspracticeit.com
74.121.64.42	A	zixvpm.joint-surgeons.com
74.121.64.43	A	mail.columbussleepconsultants.com
74.121.64.44	A+PTR	mail.eastsidedermatology.com
74.121.64.45	A	mail.arenaeyesurgeons.com
74.121.64.48	A	mail.immsinc.com
74.121.64.48	A	mail.caephysicians.com
74.121.64.49	A	mail.chcgd.com
74.121.64.49	A	mail.chcgd.org
74.121.64.51	PTR	mail.maumeeeyeclinic.com
74.121.64.80	PTR	mx.ntghostig.com
74.121.64.80	A	imap.ntghosting.com
74.121.64.80	A	mx.ntghosting.com
74.121.64.81	A	thevestagroup.com
74.121.64.81	A	www.curiocabinet.com
74.121.64.89	A	osuhealthplan.org
74.121.64.160	PTR	mx.ntghosting.com
74.121.64.161	A	tagbilling.com
74.121.64.232	A	mail.cshco.com
74.121.65.36	A	myohsaa.ohsaa.org
74.121.65.43	A	secure.soita.org
74.121.65.44	A	lakewoodcityschools.tv
74.121.65.45	A	montgomery.k12.oh.us
74.121.65.47	A	manchester.web1.schoolpointe.com
74.121.65.47	A	www.mayfield.k12.oh.us
74.121.65.49	A	digitalscoutservices.net
74.121.65.49	A	www.digitalscoutservices.net
74.121.65.117	A	reachoutstore.com
74.121.65.132	A+PTR	switch01.movepoint.net
74.121.65.136	PTR	nas01.movepoint.net
74.121.65.136	A	smtp.mvptmail.com
74.121.65.146	A+PTR	hosting01.movepoint.net
74.121.65.146	A	movepoint.org
74.121.65.146	A	movepoint.net
74.121.65.150	A+PTR	mail01.movepoint.net
74.121.65.150	A	mvptmail.com
74.121.65.150	A	ns2.movepoint.net
74.121.65.164	A+PTR	fw.phydio.com
74.121.65.164	A	smtp.heavyload.net
74.121.65.164	A	smtp.phydio.com
74.121.65.165	PTR	fw1.phydio.com
74.121.65.165	A	smtp-1.heavyload.net
74.121.65.166	PTR	fw2.phydio.com
74.121.65.167	PTR	www.phydio.com
74.121.65.168	A	webmail.phydio.com
74.121.65.170	PTR	webmail.insuraware.com
74.121.65.170	A	insuraware.com
74.121.65.180	A	egress.findfred.com
74.121.65.181	A+PTR	www.findfred.com
74.121.65.181	A	findfred.com
74.121.65.182	A	api.findfred.com
74.121.65.183	PTR	smtp.findfred.com
74.121.66.86	A	oldtickets.iq-ity.com
74.121.66.93	PTR	remote.iq-ity.com
74.121.66.93	PTR	sharepoint.iq-ity.com
74.121.66.93	A+PTR	remote.iq-ity.net
74.121.66.96	A	mail.cardinalortho.com
74.121.66.96	A	office.cardinalortho.com
74.121.66.96	A	webmail.cardinalortho.com
74.121.66.97	A	mail.prmontarget.com
74.121.66.100	A	pop.lipplaw.com
74.121.66.118	A	centerpointdevelopment.com
74.121.66.119	PTR	nuclearups.com
74.121.66.139	PTR	mxus.exactsoftware.com
74.121.66.204	A+PTR	mx.careworks.com
74.121.66.205	PTR	mx1.careworks.com
74.121.66.210	A+PTR	ns1.careworks.com
74.121.66.211	A+PTR	ns2.careworks.com
74.121.66.216	A	www.ccitpa.com
74.121.66.216	A	s10a8945.ccitpa.com
74.121.66.216	A	ccitpa.com
74.121.66.218	A	careworksusa.com
74.121.66.221	A	careworks.com
74.121.66.223	A	go2bis.com
74.121.66.223	A	www.go2bis.com
74.121.66.240	A	wellcomp.com
74.121.66.240	A	fortereview.com
74.121.66.240	A	www.wellcomp.com
74.121.67.12	A	ns3.pchdns.com
74.121.67.75	A	missionep.com
74.121.67.75	A	www.missionep.com
74.121.67.79	A	missionessential.com
74.121.67.79	A	www.missionessential.com
74.121.67.80	A	mep-dlite.net
74.121.67.80	A	missionep-dlite.net
74.121.67.80	A	missionessentialpersonnel.com
74.121.67.92	A	ns2.missionep.com
74.121.67.93	A	ns1.missionep.com
74.121.67.125	A+PTR	exchange.missionep.com
74.121.67.125	A	mail.missionep.com
74.121.67.126	A	exchange.justice-si.com
74.121.67.146	A	www.reachoutwireless.com
74.121.67.146	A	www.reachoutmobile.com
74.121.67.146	A	reachoutwireless.com
74.121.67.151	A	sfrowdp.com
74.121.67.152	A	nxsgw.com
74.121.67.152	A	ideas-it.com
74.121.67.163	A	tsihomephone.com
74.121.67.163	A	reachoutagents.com
74.121.67.163	A	avreachoutwireless.com
74.121.67.170	A	sfarchive.com
74.121.67.181	A	row-store.com
74.121.67.183	A	nexusmd1.com
74.121.67.222	PTR	spamfilter.ecotoh.net
74.121.67.222	PTR	spamfilter.ecotoh.org