Robtex

Up: 72.13.176.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 72.13.176.0/23
Down right: 72.13.178.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.13.176.8	PTR	iphost-72-13-176-8.cgy.wiband.net
72.13.176.37	PTR	iphost-72-13-176-37.cgy.wiband.net
72.13.176.47	PTR	iphost-72-13-176-47.cgy.wiband.net
72.13.176.68	PTR	iphost-72-13-176-68.cgy.wiband.net
72.13.176.133	A	daisybazzar.com
72.13.176.221	PTR	iphost-72-13-176-221.cgy.wiband.net
72.13.176.223	PTR	iphost-72-13-176-223.cgy.wiband.net
72.13.177.169	PTR	iphost-72-13-177-169.cgy.wiband.net
72.13.178.3	PTR	iphost-72-13-178-3.cgy.wiband.net
72.13.178.6	PTR	iphost-72-13-178-6.cgy.wiband.net
72.13.178.8	PTR	iphost-72-13-178-8.cgy.wiband.net
72.13.178.14	PTR	iphost-72-13-178-14.cgy.wiband.net
72.13.178.15	PTR	iphost-72-13-178-15.cgy.wiband.net
72.13.178.24	PTR	iphost-72-13-178-24.cgy.wiband.net
72.13.178.25	PTR	iphost-72-13-178-25.cgy.wiband.net
72.13.178.26	PTR	iphost-72-13-178-26.cgy.wiband.net
72.13.178.28	PTR	iphost-72-13-178-28.cgy.wiband.net
72.13.178.28	A	saga.sagatech.ca
72.13.178.37	PTR	iphost-72-13-178-37.cgy.wiband.net
72.13.178.38	PTR	iphost-72-13-178-38.cgy.wiband.net
72.13.178.39	PTR	iphost-72-13-178-39.cgy.wiband.net
72.13.178.42	PTR	iphost-72-13-178-42.cgy.wiband.net
72.13.178.44	PTR	iphost-72-13-178-44.cgy.wiband.net
72.13.178.46	PTR	iphost-72-13-178-46.cgy.wiband.net
72.13.178.50	PTR	iphost-72-13-178-50.cgy.wiband.net
72.13.178.52	PTR	iphost-72-13-178-52.cgy.wiband.net
72.13.178.53	PTR	iphost-72-13-178-53.cgy.wiband.net
72.13.178.57	PTR	mail.news.albertabeef.org
72.13.178.61	A	remote.mcinnisandholloway.com
72.13.178.65	PTR	iphost-72-13-178-65.cgy.wiband.net
72.13.178.74	PTR	iphost-72-13-178-74.cgy.wiband.net
72.13.178.76	A+PTR	mail.acop.ca
72.13.178.85	PTR	iphost-72-13-178-85.cgy.wiband.net
72.13.178.88	PTR	directtec.ca
72.13.178.88	A	mx01.directtec.ca
72.13.178.88	A	remote.directtec.ca
72.13.178.92	PTR	pinepetroleum.ca
72.13.178.94	A	backup.directtec.ca
72.13.178.109	PTR	mail.oillifttechnology.com
72.13.178.109	A	mail.eotools.com
72.13.178.110	PTR	iphost-72-13-178-110.cgy.wiband.net
72.13.178.111	PTR	mail.compactcompression.com
72.13.178.114	PTR	iphost-72-13-178-114.cgy.wiband.net
72.13.178.121	PTR	iphost-72-13-178-121.cgy.wiband.net
72.13.178.127	PTR	iphost-72-13-178-127.cgy.wiband.net
72.13.178.129	PTR	iphost-72-13-178-129.cgy.wiband.net
72.13.178.130	PTR	iphost-72-13-178-130.cgy.wiband.net
72.13.178.136	PTR	iphost-72-13-178-136.cgy.wiband.net
72.13.178.138	PTR	iphost-72-13-178-138.cgy.wiband.net
72.13.178.153	PTR	iphost-72-13-178-153.cgy.wiband.net
72.13.178.155	PTR	iphost-72-13-178-155.cgy.wiband.net
72.13.178.166	PTR	iphost-72-13-178-166.cgy.wiband.net
72.13.178.168	PTR	iphost-72-13-178-168.cgy.wiband.net
72.13.178.176	PTR	iphost-72-13-178-176.cgy.wiband.net
72.13.178.183	PTR	iphost-72-13-178-183.cgy.wiband.net
72.13.178.184	PTR	iphost-72-13-178-184.cgy.wiband.net
72.13.178.187	PTR	iphost-72-13-178-187.cgy.wiband.net
72.13.178.189	PTR	iphost-72-13-178-189.cgy.wiband.net
72.13.178.204	PTR	iphost-72-13-178-204.cgy.wiband.net
72.13.178.208	PTR	iphost-72-13-178-208.cgy.wiband.net
72.13.178.222	PTR	iphost-72-13-178-222.cgy.wiband.net
72.13.178.224	PTR	iphost-72-13-178-224.cgy.wiband.net
72.13.178.229	PTR	iphost-72-13-178-229.cgy.wiband.net
72.13.178.232	PTR	iphost-72-13-178-232.cgy.wiband.net
72.13.178.233	PTR	iphost-72-13-178-233.cgy.wiband.net
72.13.178.244	PTR	iphost-72-13-178-244.cgy.wiband.net
72.13.178.245	PTR	iphost-72-13-178-245.cgy.wiband.net
72.13.178.246	PTR	iphost-72-13-178-246.cgy.wiband.net
72.13.178.247	PTR	iphost-72-13-178-247.cgy.wiband.net
72.13.178.248	PTR	iphost-72-13-178-248.cgy.wiband.net
72.13.178.251	PTR	iphost-72-13-178-251.cgy.wiband.net
72.13.178.252	PTR	iphost-72-13-178-252.cgy.wiband.net
72.13.178.253	PTR	iphost-72-13-178-253.cgy.wiband.net
72.13.178.254	PTR	iphost-72-13-178-254.cgy.wiband.net
72.13.179.10	PTR	iphost-72-13-179-10.cgy.wiband.net
72.13.179.10	A	name2.glenres.ca
72.13.179.10	A	ns2.nsssl.com
72.13.179.19	PTR	mail.hostedworx.com
72.13.179.25	PTR	iphost-72-13-179-25.cgy.wiband.net
72.13.179.25	A	bigpipeinc.com
72.13.179.25	A	www.bigpipeinc.com
72.13.179.75	PTR	iphost-72-13-179-75.cgy.wiband.net
72.13.179.75	A	lmg-app.leadingmanufacturing.com
72.13.179.100	A	mailhost.liquidsinmotion.com
72.13.179.100	A	mail.liquidsinmotion.com
72.13.179.162	PTR	mailgp.firstbroadband.ca
72.13.179.168	A+PTR	mail1gp.firstbroadband.ca
72.13.179.168	A	mailgp.x-stream.ca
72.13.179.168	A	mailgp.firstbroadband.ca
72.13.179.194	A	ns1.reddoggroup.us
72.13.179.194	A	ns1.ebackupinc.com
72.13.179.194	A	ns1.roots-homeschooling.com
72.13.179.198	A	support.ebackupinc.com
72.13.179.198	A	remote.ebackupinc.com