Robtex

Up: 72.2.32.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 72.2.40.0/22
Down right: 72.2.44.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.2.40.9	A	owa.bcgeu.ca
72.2.40.24	PTR	h72-2-42-24.bigpipeinc.com
72.2.40.26	PTR	h72-2-42-26.bigpipeinc.com
72.2.40.41	PTR	h72-2-42-41.bigpipeinc.com
72.2.40.55	A	smtp0.newfocusonline.com
72.2.40.72	PTR	h72-2-42-72.bigpipeinc.com
72.2.40.82	PTR	h72-2-42-82.bigpipeinc.com
72.2.40.122	PTR	h72-2-42-122.bigpipeinc.com
72.2.40.122	A	remote.agrocorp.ca
72.2.40.128	PTR	h72-2-42-128.bigpipeinc.com
72.2.40.153	PTR	h72-2-42-153.bigpipeinc.com
72.2.40.153	A	smtp0.waitsite.com
72.2.40.155	PTR	h72-2-42-155.bigpipeinc.com
72.2.40.162	PTR	h72-2-42-162.bigpipeinc.com
72.2.40.180	PTR	ns2.utherverse.net
72.2.40.180	A	ns2.ideaflood.com
72.2.40.180	A	ns2.utherversedigitalinc.com
72.2.40.181	PTR	ns4.utherverse.net
72.2.40.181	A	ns4.utherversedigitalinc.com
72.2.40.183	PTR	mail.utherverse.net
72.2.40.183	PTR	mail1.utherverse.net
72.2.40.210	PTR	h72-2-42-210.bigpipeinc.com
72.2.40.210	A	supportaccess.sophos.com
72.2.40.227	PTR	h72-2-42-227.bigpipeinc.com
72.2.40.227	A	bcmon.ca
72.2.40.242	PTR	h72-2-42-242.bigpipeinc.com
72.2.40.245	A	mail.stemcell.com
72.2.41.10	PTR	h72-2-41-10.bigpipeinc.com
72.2.41.10	A	ns1.xipservices.com
72.2.41.10	A	ns1.teligencecom.com
72.2.41.11	PTR	h72-2-41-11.bigpipeinc.com
72.2.41.11	A	ns2.teligencecom.com
72.2.41.11	A	ns2.xipservices.com
72.2.41.19	PTR	h72-2-41-19.bigpipeinc.com
72.2.41.19	A	guy-spy.com
72.2.41.36	A	phonezodiac.com
72.2.41.37	A	smartappmobile.com
72.2.41.80	PTR	h72-2-41-80.bigpipeinc.com
72.2.41.80	A	chatonlivelinks.com
72.2.41.80	A	*.mensfreechatline.com
72.2.41.91	PTR	h72-2-41-91.bigpipeinc.com
72.2.41.230	A	outbound.teligence.net
72.2.41.247	A	mail.vibeline.com
72.2.41.247	A	mail.yabert.com
72.2.41.247	A	mail.xipservices.com
72.2.41.251	A	nat.teligence.net
72.2.42.1	PTR	h72-2-42-1.bigpipeinc.com
72.2.42.40	PTR	h72-2-42-40.bigpipeinc.com
72.2.42.41	PTR	h72-2-42-41.bigpipeinc.com
72.2.42.59	PTR	h72-2-42-59.bigpipeinc.com
72.2.42.66	PTR	h72-2-42-66.bigpipeinc.com
72.2.42.75	PTR	h72-2-42-75.bigpipeinc.com
72.2.42.106	A+PTR	exchange.icsevents.com
72.2.42.178	PTR	h72-2-42-178.bigpipeinc.com
72.2.42.178	A	remote.bcpsqc.ca
72.2.42.220	A	mail.newsplusnews.com
72.2.43.42	PTR	h72-2-43-42.bigpipeinc.com
72.2.43.57	PTR	h72-2-43-57.bigpipeinc.com
72.2.43.130	A+PTR	mail.ekcga.com
72.2.43.130	A	ekcga.ca
72.2.43.130	A	ekcpa.ca
72.2.43.162	PTR	h72-2-43-162.bigpipeinc.com
72.2.43.162	A	services.raincoast.com
72.2.43.163	A+PTR	mail.raincoast.com
72.2.43.171	A+PTR	galah.raincoast.com
72.2.43.180	A	asa.raincoast.com
72.2.43.194	PTR	h72-2-43-194.bigpipeinc.com
72.2.43.195	PTR	h72-2-43-195.bigpipeinc.com
72.2.43.195	A	houle.ca
72.2.43.195	A	downloads.houle.ca
72.2.43.200	PTR	h72-2-43-200.bigpipeinc.com
72.2.43.200	A	sip.houle.ca
72.2.43.203	PTR	h72-2-43-203.bigpipeinc.com
72.2.43.203	A	sip.houle.ca
72.2.43.220	A	exchange2.houle.ca
72.2.43.220	A	autodiscover.houle.ca
72.2.43.225	PTR	h72-2-43-225.bigpipeinc.com
72.2.43.228	A	mail.pggroup.com
72.2.43.242	A	alpha-aviation.ca
72.2.43.242	A	boundarybayairservices.com
72.2.43.242	A	boundarybayairservices.ca
72.2.44.3	PTR	h72-2-44-3.bigpipeinc.com
72.2.44.3	A	ns2.dockmaster.net
72.2.44.3	A	orenda.dockmaster.net
72.2.44.4	A	dockmaster.net
72.2.44.4	A	mail.dockmaster.net
72.2.44.11	PTR	h72-2-44-11.bigpipeinc.com
72.2.44.11	A	weinberger.ca
72.2.44.11	A	pvvn.com
72.2.44.73	PTR	h72-2-44-73.bigpipeinc.com
72.2.44.90	PTR	h72-2-44-90.bigpipeinc.com
72.2.44.178	PTR	h72-2-44-178.bigpipeinc.com
72.2.44.192	A	mail.cherishdirect.com
72.2.45.194	PTR	h72-2-45-194.bigpipeinc.com
72.2.45.194	A	burnard.com
72.2.46.1	A+PTR	outtie.microserve.ca
72.2.46.2	PTR	mail.microserve.ca
72.2.46.3	A	mail.microserve.ca
72.2.46.4	PTR	creste.microserve.ca
72.2.46.5	A	term.microserve.ca
72.2.46.5	A	creste.microserve.ca
72.2.46.21	A	cwreports.microserve.ca
72.2.46.25	A	connect.microserve.ca
72.2.46.26	A	autodiscover.microserve.ca
72.2.46.26	A	webmail.microserve.ca
72.2.46.71	A	intranet.microserve.ca
72.2.46.72	A+PTR	cms.microserve.ca
72.2.46.77	A	reports.microserve.ca
72.2.46.78	A	shiplink.microserve.ca
72.2.46.155	A	mail.microservelab.ca
72.2.46.192	PTR	boknowshockey.com
72.2.46.194	A	bwchockey.com
72.2.46.199	A	theurbangarage.com
72.2.46.200	PTR	www.vancouverselects.com
72.2.46.201	PTR	www.vancouversportscamp.ca
72.2.47.14	A	lync.microserve.ca
72.2.47.21	A	lyncaccess.microserve.ca