Robtex

Up: 66.220.32.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 66.220.32.0/21
Down right: 66.220.40.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.220.32.6	A	ns132.elipswitch.com
66.220.32.6	A	ns131.elipswitch.com
66.220.32.7	A	ns141.elipswitch.com
66.220.32.194	A+PTR	tftp.acorntechcorp.com
66.220.32.195	A+PTR	barracuda2.acorntechcorp.com
66.220.32.196	A+PTR	bandwidth.acorntechcorp.com
66.220.32.198	A	puppet.acorntechcorp.com
66.220.32.226	A+PTR	mail.acorntechcorp.com
66.220.32.229	A+PTR	heimdall.acorntechcorp.com
66.220.32.229	A	opticon.acorntechcorp.com
66.220.32.230	A	wsusremote.acorntechcorp.com
66.220.32.242	A+PTR	webfilter.acorntechcorp.com
66.220.32.245	A+PTR	cs1.swiftzip.com
66.220.32.245	A	ns1.swiftzip.com
66.220.32.247	A	vmhost.acorntechcorp.com
66.220.38.124	A	sir.bszhe.club
66.220.40.253	PTR	t1-3660.network.acorntechcorp.com
66.220.42.20	A	landispac.com
66.220.42.60	A+PTR	media2.opencampus.com
66.220.42.62	A	media3.opencampus.com
66.220.42.62	A	onlinecampus.org
66.220.42.147	PTR	cooper.imedris.net
66.220.42.243	A	test-flexach.com
66.220.43.2	PTR	atchosting.acorntechcorp.com
66.220.43.2	A	ns.vcrivco.org
66.220.43.2	A	mail.marchhealthcare.com
66.220.43.22	PTR	www.gpacs.com
66.220.43.36	A	mvprv.managedbyacorn.com
66.220.43.39	PTR	mail.ndap.com
66.220.43.39	A	ns2.ndap.com
66.220.43.40	A	ns01.ndap.com
66.220.43.40	A	ns1.ndap.com
66.220.43.52	PTR	secure.acorntechcorp.com
66.220.43.59	PTR	hosting.acorntechcorp.com
66.220.43.59	A	pcariverside.org
66.220.43.62	A	smarthost.acorntechcorp.com
66.220.43.62	A	swiftcomm.com
66.220.43.62	A	www.elipswitch.com
66.220.43.101	A	teleris.net
66.220.43.104	PTR	ns104.elipswitch.com
66.220.43.120	PTR	mail.bullsession.com
66.220.43.120	PTR	corp.freerealtime.com
66.220.43.120	PTR	mailhost.freerealtime.com
66.220.43.162	PTR	active.freerealtime.com
66.220.44.124	A	postage.kpimed.com
66.220.44.128	A	nudesexteacher.com
66.220.46.8	A	mailw.tmcobb.com
66.220.47.5	A	dns2.centrihealth.com
66.220.47.6	A	dns1.centrihealth.com
66.220.47.66	PTR	dctwo.teamaccent.com
66.220.47.66	A	mail.winningtheunwinnablewar.net
66.220.47.66	A	mail.arc-tv.com
66.220.47.114	A	cloudcraft.tv
66.220.47.136	A	handpunchclock.com
66.220.47.136	A	watchlite.com
66.220.47.195	PTR	mail.arrowheadcu.org
66.220.47.202	A	ebranch.arrowheadcu.org