Robtex

Up: 72.236.64.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 72.236.64.0/21
Down right: 72.236.72.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.236.65.4	A+PTR	ns2-tlh.infinity-software.com
72.236.65.8	A	ns1-tlh.infinity-software.com
72.236.65.32	A+PTR	barracuda.infinity-mail.net
72.236.65.32	A+PTR	barracuda1.infinity-mail.net
72.236.65.32	A+PTR	barracuda2.infinity-mail.net
72.236.65.35	A	ms2.infinity-software.com
72.236.65.57	A	mail.fcatexplorer.com
72.236.65.76	A+PTR	infinity-software.com
72.236.65.76	PTR	apps.infinity-software.com
72.236.65.76	PTR	employees.infinity-software.com
72.236.65.90	A	ibis.infinity-software.com
72.236.65.90	A	cap.infinity-software.com
72.236.65.90	A	itv.infinity-software.com
72.236.65.112	A	infinity-mail.net
72.236.65.113	A	wpdev.designfarm.com
72.236.65.118	A+PTR	gsficsp.infinity-software.com
72.236.65.125	A	barnettfronczakbarlowestage.isd-stagenet.com
72.236.67.139	A+PTR	mail.altrua.com
72.236.67.139	A	mail.altruamarketing.com
72.236.67.140	A	*.altrua.com
72.236.67.140	A	altrua.com
72.236.67.154	PTR	mail.duntoole.com
72.236.68.50	A	mail.ford-transmission.com
72.236.68.50	A	mail.man-trans.net
72.236.68.50	A	mail.mantrans.net
72.236.68.146	PTR	mail.southernfl.com
72.236.68.243	PTR	mail.altrua.com
72.236.68.244	PTR	www.altrua.com
72.236.68.244	A	wave94.com
72.236.68.244	A	magnoliahorsefarm.com
72.236.69.36	PTR	dn01.beceng.com
72.236.69.37	PTR	dn02.beceng.com
72.236.69.39	PTR	becconsult.com
72.236.69.39	PTR	becind.com
72.236.69.39	PTR	becserv.com
72.236.69.162	PTR	mail.facc.org
72.236.70.20	PTR	mail.williams-communications.com
72.236.70.20	A	williams-communications.com
72.236.70.213	PTR	ounce.org
72.236.70.222	PTR	mail.ounce.org
72.236.70.234	A	netsatonline.net
72.236.70.240	PTR	gk1.360sip.com
72.236.72.2	PTR	yellow2.ctusa1.com
72.236.72.3	PTR	yellow3.ctusa1.com
72.236.74.6	A	lucerodc1.summithostingonline.com
72.236.74.7	A	lucerodc1.summithostingonline.com
72.236.74.7	A	admin.summithostingonline.com
72.236.74.18	A+PTR	server7.summithostingonline.com
72.236.74.19	A+PTR	server7.summithostingonline.com
72.236.74.23	A	lucerotraining.com
72.236.74.23	A	lucerohosting.com
72.236.74.114	PTR	gto-exchange10.gtoinc.com
72.236.74.114	A	gatesthatopen.com
72.236.74.115	A	gto-exchange10.gtoinc.com
72.236.74.116	A	smtp.luxordirect.com
72.236.74.116	A	mail.gateopenerwarehouse.com
72.236.75.10	PTR	paulwestlaw.com
72.236.75.10	PTR	mail.pineyzhomes
72.236.75.10	PTR	mail.biblequiz.cc
72.236.75.74	PTR	floridabaptistassociation.org
72.236.75.74	PTR	www.floridabaptistassociation.org
72.236.75.82	PTR	tsmenterprises.com
72.236.75.82	PTR	tsmonline.us
72.236.75.82	PTR	www.tsmenterprises.com
72.236.75.93	A	www.life-flights.com
72.236.75.99	A	www.discountairambulance.com
72.236.75.112	PTR	biblequiz.cc
72.236.75.112	PTR	thefqa.com
72.236.75.112	PTR	www.biblequiz.cc
72.236.75.120	PTR	lighthousechildrenshome.com
72.236.75.120	PTR	www.lighthousechildrenshome.com
72.236.75.130	A	mailin.thefarcornersoftheglobe.com
72.236.75.130	A	thefarcornersoftheglobe.com
72.236.75.144	A	thefarcorniceofthecosmos.com
72.236.75.144	A	mailin.thefarcorniceofthecosmos.com
72.236.75.165	A	services.vashti.net
72.236.75.188	A	wakullavolcano.vashti.net
72.236.75.209	A	mailin.windsongs.us
72.236.75.209	A	mailin.stephensontales.com
72.236.75.209	A	mailin.robinswindsongs.com
72.236.75.220	A	mailin.a1aircharter.com
72.236.75.222	A	services.vashti.net
72.236.75.253	A	mailin.tallahasseetrailblazers.org
72.236.75.253	A	mailin.successby6-fl.org