Robtex

Up: 68.101.40.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 68.101.40.0/23
Down right: 68.101.42.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
68.101.40.6	A	pbmsbs2k11.penbaymedia.com
68.101.40.10	PTR	wsip-68-101-40-10.dc.dc.cox.net
68.101.40.10	A	mail.ceriumtech.com
68.101.40.10	A	mail.ceriumtech.net
68.101.40.53	A+PTR	wsip-68-101-40-53.dc.dc.cox.net
68.101.40.73	A	vault.crbc.org
68.101.40.186	PTR	wsip-68-101-40-186.dc.dc.cox.net
68.101.40.186	A	webmail.twin-soft.com
68.101.40.209	A+PTR	mail.hp-environ.com
68.101.40.209	A	hp-environ.com
68.101.40.216	PTR	darwin.emilygrace.com
68.101.40.241	A	ns.ince.net
68.101.40.241	A	ns1.ince.net
68.101.40.254	A	phototran.com
68.101.41.34	A	mail.elitewines.net
68.101.41.43	A	mail.madiganandscott.com
68.101.41.96	A	fantsyphil.com
68.101.41.96	A	avipm.com
68.101.41.96	A	tapmiller.com
68.101.41.113	A	smtp.aapc.org
68.101.41.132	A+PTR	wsip-68-101-41-132.dc.dc.cox.net
68.101.41.151	PTR	wsip-68-101-41-151.dc.dc.cox.net
68.101.41.151	A	com.jeremycleveland.com
68.101.41.151	A	cleveland5.com
68.101.41.179	A+PTR	wsip-68-101-41-179.dc.dc.cox.net
68.101.41.232	A+PTR	wsip-68-101-41-232.dc.dc.cox.net
68.101.41.249	A+PTR	wsip-68-101-41-249.dc.dc.cox.net
68.101.41.250	A+PTR	wsip-68-101-41-250.dc.dc.cox.net
68.101.41.250	A	stathisinsurance.com
68.101.41.250	A	mail.stathisinsurance.com
68.101.42.16	A+PTR	mail.govtproperty.com
68.101.42.16	A	deathmasterfile.org
68.101.42.16	A	govtproperty.com
68.101.42.20	PTR	wsip-68-101-42-20.dc.dc.cox.net
68.101.42.20	A	newtrumpet.org
68.101.42.20	A	thehappyprisoner.org
68.101.42.26	PTR	hyperdyne.biz
68.101.42.36	A	mail.nvoncology.com
68.101.42.60	A	mail.chej.org
68.101.42.68	PTR	wsip-68-101-42-68.dc.dc.cox.net
68.101.42.68	A	loanminer.com
68.101.42.68	A	www.loanminer.com
68.101.42.71	PTR	www.budtraynor.com
68.101.42.71	A	babylift.us
68.101.42.71	A	misinc.us
68.101.42.72	A+PTR	wsip-68-101-42-72.dc.dc.cox.net
68.101.42.73	PTR	wsip-68-101-42-73.dc.dc.cox.net
68.101.42.85	A+PTR	wsip-68-101-42-85.dc.dc.cox.net
68.101.42.114	PTR	secure.rx-it.com
68.101.42.114	A	exsat.satpar.com
68.101.42.116	PTR	wsip-68-101-42-116.dc.dc.cox.net
68.101.42.116	A	novaresume.com
68.101.42.151	A	vapreview.com
68.101.42.151	A	*.vainc.com
68.101.42.152	PTR	kang.com
68.101.42.170	A	mail.telelinkcom.com
68.101.42.182	A	mail.stoutandteague.com
68.101.42.187	A	mail.lubinsalvetti.com
68.101.42.187	A	mail.rlapc.com
68.101.42.200	PTR	mail.boudinot.net
68.101.42.201	PTR	wsip-68-101-42-201.dc.dc.cox.net
68.101.42.211	A	wsip-68-101-42-211.dc.dc.cox.net
68.101.42.211	A	*.dc.lawblogger.org
68.101.42.213	A+PTR	wsip-68-101-42-213.dc.dc.cox.net
68.101.42.213	A	vacantjobs.com
68.101.42.213	A	garamnaukri.in
68.101.42.214	PTR	wsip-68-101-42-214.dc.dc.cox.net
68.101.43.4	A+PTR	wsip-68-101-43-4.dc.dc.cox.net
68.101.43.5	PTR	ziu.net
68.101.43.14	PTR	mail.nikuman.com
68.101.43.27	PTR	drivesajeep.com
68.101.43.27	A	mail.drivesajeep.com
68.101.43.27	A	mail.notsupported.com
68.101.43.28	A	rome.itavera.com
68.101.43.28	A	paris.itavera.com
68.101.43.31	A+PTR	wsip-68-101-43-31.dc.dc.cox.net
68.101.43.31	A	net1.carrhomes.com
68.101.43.32	A	wsip-68-101-43-32.dc.dc.cox.net
68.101.43.34	PTR	bitexecsvr01.binaryone.us
68.101.43.34	A	www.raasi.net
68.101.43.34	A	*.raasi.com
68.101.43.76	PTR	wsip-68-101-43-76.dc.dc.cox.net
68.101.43.76	A	e2k3srv.beckerkelloggberry.com
68.101.43.76	A	mail.beckerkelloggberry.com
68.101.43.80	A	gw.coltenlaw.com
68.101.43.80	A	smtp.coltenlaw.com
68.101.43.148	PTR	pointel.net
68.101.43.162	PTR	wsip-68-101-43-162.dc.dc.cox.net
68.101.43.162	A	remote.techstratinc.com
68.101.43.167	A	waranddiplomacy.net
68.101.43.169	PTR	mail.teameurasia.com
68.101.43.185	A	teammomtrophies.com
68.101.43.185	A	adambriggsvfx.com
68.101.43.185	A	mail.teammomtrophies.com
68.101.43.190	PTR	mail.khiali.com
68.101.43.194	PTR	wsip-68-101-43-194.dc.dc.cox.net
68.101.43.194	A	icusmail.icaros.us
68.101.43.205	A	mail.pcmgdemo.com
68.101.43.238	PTR	homineata.com
68.101.43.239	PTR	ndiainc.com
68.101.43.242	A	mail.siteidiq.gov
68.101.43.245	A	dougaustin.com
68.101.43.245	A	ns1.dougaustin.com