Robtex

Up: 23.233.128.0/17
Can't show all results, try to descend to a more specific CIDR
Down left: 23.233.128.0/19
Down right: 23.233.160.0/19

IP	Type	Hostname
23.233.128.16	A+PTR	dns11.videotron.ca
23.233.128.20	A	pop.videotron.net
23.233.128.25	PTR	modemcable025.128-233.23.mc.videotron.ca
23.233.128.25	A	gslb01.gslb.videotron.com
23.233.128.28	A+PTR	alt41.smtp-out.videotron.ca
23.233.129.155	PTR	modemcable155.129-233.23.mc.videotron.ca
23.233.129.155	A	dc-88bb92aa.zotak.net
23.233.132.133	PTR	modemcable133.132-233.23.mc.videotron.ca
23.233.133.104	PTR	modemcable104.133-233.23.mc.videotron.ca
23.233.133.130	PTR	modemcable130.133-233.23.mc.videotron.ca
23.233.140.38	PTR	modemcable038.140-233.23.mc.videotron.ca
23.233.141.121	PTR	modemcable121.141-233.23.mc.videotron.ca
23.233.142.213	PTR	modemcable213.142-233.23.mc.videotron.ca
23.233.147.190	A	po.sted.ca
23.233.147.190	A	tru.sted.ca
23.233.149.56	PTR	modemcable056.149-233.23.mc.videotron.ca
23.233.150.184	PTR	modemcable184.150-233.23.mc.videotron.ca
23.233.153.160	PTR	modemcable160.153-233.23.mc.videotron.ca
23.233.155.50	PTR	modemcable050.155-233.23.mc.videotron.ca
23.233.155.128	PTR	modemcable128.155-233.23.mc.videotron.ca
23.233.157.200	A	outnetwork.no-ip.biz
23.233.162.239	PTR	modemcable239.162-233.23.mc.videotron.ca
23.233.163.141	A	magenois.net
23.233.167.134	PTR	modemcable134.167-233.23.mc.videotron.ca
23.233.168.148	PTR	modemcable148.168-233.23.mc.videotron.ca
23.233.174.33	PTR	modemcable033.174-233.23.mc.videotron.ca
23.233.175.86	PTR	modemcable086.175-233.23.mc.videotron.ca
23.233.179.78	PTR	modemcable078.179-233.23.mc.videotron.ca
23.233.179.208	PTR	modemcable208.179-233.23.mc.videotron.ca
23.233.182.42	PTR	modemcable042.182-233.23.mc.videotron.ca
23.233.187.13	A	mail.rp-alis.com
23.233.188.172	PTR	modemcable172.188-233.23.mc.videotron.ca