Robtex

Up: 23.233.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 23.233.128.0/18
Down right: 23.233.192.0/18
(Some of the IP numbers are capped at 3 entries)

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
23.233.193.205	PTR	modemcable205.193-233.23.mc.videotron.ca
23.233.194.118	PTR	modemcable118.194-233.23.mc.videotron.ca
23.233.195.44	PTR	modemcable044.195-233.23.mc.videotron.ca
23.233.199.16	PTR	modemcable016.199-233.23.mc.videotron.ca
23.233.199.52	PTR	modemcable052.199-233.23.mc.videotron.ca
23.233.200.142	PTR	modemcable142.200-233.23.mc.videotron.ca
23.233.203.195	PTR	modemcable195.203-233.23.mc.videotron.ca
23.233.205.30	PTR	modemcable030.205-233.23.mc.videotron.ca
23.233.205.30	A	rouhep.dyndns-ip.com
23.233.205.237	PTR	modemcable237.205-233.23.mc.videotron.ca
23.233.205.237	A	ifrancky.com
23.233.205.237	A	studiocdclic.com
23.233.207.176	PTR	modemcable176.207-233.23.mc.videotron.ca
23.233.207.176	A	mayhera.com
23.233.207.176	A	dmmlumber.com
23.233.207.239	PTR	modemcable239.207-233.23.mc.videotron.ca
23.233.207.239	A	maximelaramee.com
23.233.211.132	PTR	modemcable132.211-233.23.mc.videotron.ca
23.233.216.9	PTR	modemcable009.216-233.23.mc.videotron.ca
23.233.220.252	A	jnu.ca
23.233.224.41	PTR	modemcable041.224-233.23.mc.videotron.ca
23.233.224.41	A	myh0me.com
23.233.225.74	A	yu-shan.net
23.233.227.106	PTR	modemcable106.227-233.23.mc.videotron.ca
23.233.228.191	A	nmc-home.com
23.233.230.187	PTR	modemcable187.230-233.23.mc.videotron.ca
23.233.232.160	PTR	modemcable160.232-233.23.mc.videotron.ca
23.233.232.160	A	devastedworld.com
23.233.237.11	PTR	modemcable011.237-233.23.mc.videotron.ca
23.233.238.211	PTR	modemcable211.238-233.23.mc.videotron.ca
23.233.240.147	PTR	modemcable147.240-233.23.mc.videotron.ca
23.233.240.147	A	ns1.famillebouchard.net
23.233.240.147	A	ns2.famillebouchard.net
23.233.245.47	PTR	modemcable047.245-233.23.mc.videotron.ca
23.233.247.242	PTR	modemcable242.247-233.23.mc.videotron.ca
23.233.255.43	PTR	modemcable043.255-233.23.mc.videotron.ca
23.233.255.43	A	host.gotdns.org