Robtex

Up: 72.138.0.0/17
Can't show all results, try to descend to a more specific CIDR
Down left: 72.138.0.0/19
Down right: 72.138.32.0/19
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.138.2.150	PTR	unallocated-static.rogers.com.2.138.72.in-addr.arpa
72.138.2.210	PTR	unallocated-static.rogers.com.2.138.72.in-addr.arpa
72.138.2.210	A	www.relectronic.com
72.138.3.117	PTR	cpe602ad07347cf-cm602ad07347cc.cpe.net.cable.rogers.com
72.138.4.20	PTR	unallocated-static.rogers.com.4.138.72.in-addr.arpa
72.138.4.20	A	lampkin.ca
72.138.5.127	PTR	cpe586d8f0c6f91-cm001cea35ba7c.cpe.net.cable.rogers.com
72.138.6.150	PTR	unallocated-static.rogers.com
72.138.6.150	A	norstarwd.com
72.138.7.91	A	wwhsdsc.org
72.138.7.251	A	mighty-g.com
72.138.11.202	PTR	unallocated-static.rogers.com
72.138.11.202	A	gateway.tdchristian.ca
72.138.12.36	PTR	mail.continentalpress.ca
72.138.12.36	A	mail.ivariexpress.ca
72.138.12.42	PTR	unallocated-static.rogers.com
72.138.12.42	A	www.ivariexpress.ca
72.138.12.42	A	ivariexpress.ca
72.138.12.210	A	trudellmed.com
72.138.12.229	A	www.tmml.com
72.138.13.202	PTR	unallocated-static.rogers.com
72.138.13.202	A	ns9.rymotech.com
72.138.13.203	PTR	unallocated-static.rogers.com
72.138.13.203	A	ns10.rymotech.com
72.138.13.242	A+PTR	exchange.berconrentals.ca
72.138.15.76	PTR	unallocated-static.rogers.com
72.138.15.76	A	vancouversurveyresearch.com
72.138.17.162	PTR	cpebc1401584ed3-cmbc1401584ed0.cpe.net.cable.rogers.com
72.138.17.162	A	api.calibercommunications.ca
72.138.17.163	A	apicom.calibercommunications.ca
72.138.18.29	PTR	unallocated-static.rogers.com
72.138.18.66	PTR	unallocated-static.rogers.com
72.138.18.86	PTR	unallocated-static.rogers.com
72.138.18.86	A	trieaglog.com
72.138.22.117	PTR	unallocated-static.rogers.com
72.138.22.117	A	vineyfamily.com
72.138.22.117	A	*.vineyfamily.com
72.138.24.107	A	www.psfltd.com
72.138.25.244	PTR	cpebc1401304993-cmbc1401304990.cpe.net.cable.rogers.com
72.138.25.244	A	www.curbex.io
72.138.26.114	PTR	unallocated-static.rogers.com
72.138.28.22	A	pplsrvr1.paintline.ca
72.138.28.22	A	mail.omegacompressors.com
72.138.28.22	A	mail.omegacompressors.ca
72.138.31.249	A	masjidaisha.ca
72.138.31.249	A	alhudaverdun.ca
72.138.31.249	A	mac249.macnet.ca
72.138.32.139	A	www.monassuranceaudossier.com
72.138.32.140	A	www.insuranceonfile.com
72.138.32.145	A	scm-rms2.ca
72.138.32.158	A	scm-rms.ca
72.138.32.196	PTR	unallocated-static.rogers.com
72.138.32.196	A	marshcanadaclaims.com
72.138.32.198	PTR	unallocated-static.rogers.com
72.138.32.198	A	www.scm-fic.ca
72.138.32.199	A	ns1.scm.ca
72.138.33.2	PTR	cpe185933f8a35d-cm185933f8a35a.cpe.net.cable.rogers.com
72.138.34.183	A	citrix.vfo247.com
72.138.34.186	A	antispam.vfo247.com
72.138.35.100	A+PTR	mx100.elcosystems.com
72.138.35.105	A	elcosystems.com
72.138.39.2	PTR	cpebc14012bc773-cmbc14012bc770.cpe.net.cable.rogers.com
72.138.39.213	PTR	cpe602ad06bf2e5-cm602ad06bf2e2.cpe.net.cable.rogers.com
72.138.39.213	A	ambwholesale.com
72.138.40.29	PTR	unallocated-static.rogers.com
72.138.40.29	A	allcardims.ca
72.138.42.178	PTR	unallocated-static.rogers.com
72.138.44.30	PTR	unallocated-static.rogers.com
72.138.44.202	PTR	unallocated-static.rogers.com
72.138.45.201	PTR	cpe0014d1146c02-cm001bd7cbb9b0.cpe.net.cable.rogers.com
72.138.45.201	A	ipicstorage.com
72.138.46.3	A	zn.no-ip.com
72.138.48.219	PTR	unallocated-static.rogers.com
72.138.48.219	A	oakridgefinancial.ca
72.138.50.194	A+PTR	mx1.getcracking.ca
72.138.52.35	PTR	mail.windowseal.ca
72.138.52.35	A	remote.windowseal.ca
72.138.52.35	A	autodiscover.windowseal.ca
72.138.52.188	PTR	unallocated-static.rogers.com
72.138.52.188	A	www.sarjbains.com
72.138.52.188	A	sarjbains.com
72.138.55.59	A	ns2.digitaldays.net
72.138.57.6	PTR	cpe002369b2a3c9-cm1859339f39a5.cpe.net.cable.rogers.com
72.138.57.6	A	f1aepb.f1tech.net
72.138.57.164	PTR	cpe001310828143-cm000f212f9577.cpe.net.cable.rogers.com
72.138.58.227	PTR	unallocated-static.rogers.com
72.138.58.227	A	foss.ca
72.138.58.227	A	royfossmotors.com
72.138.59.3	PTR	cpe602ad091b697-cm602ad091b694.cpe.net.cable.rogers.com
72.138.59.3	A	ipdocketing.com
72.138.59.3	A	softwareforiplawyers.com
72.138.60.219	PTR	unallocated-static.rogers.com
72.138.60.219	A	qview.ca
72.138.60.220	PTR	unallocated-static.rogers.com
72.138.60.220	A	qmpls.org