Robtex

Up: 72.136.128.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 72.136.144.0/21
Down right: 72.136.152.0/21

IP	Type	Hostname
72.136.146.0	PTR	cpe1cabc09c5953-cm1cabc09c5950.cpe.net.cable.rogers.com
72.136.147.35	PTR	cpe84948c928141-cm84948c928140.cpe.net.cable.rogers.com
72.136.147.48	PTR	cpe0013f7c070d2-cm0013f7c070ce.cpe.net.cable.rogers.com
72.136.147.130	PTR	cpef0f249a018c3-cmf0f249a018c0.cpe.net.cable.rogers.com
72.136.147.195	PTR	cpebc4dfb6d8233-cmbc4dfb6d8230.cpe.net.cable.rogers.com
72.136.149.2	PTR	cpe602ad0861495-cm602ad0861492.cpe.net.cable.rogers.com
72.136.149.82	PTR	cpe602ad091dd2f-cm602ad091dd2c.cpe.net.cable.rogers.com
72.136.149.147	PTR	cpe788df71335d3-cm788df71335d0.cpe.net.cable.rogers.com
72.136.151.51	PTR	cpe20aa4b7be774-cmbcc810143908.cpe.net.cable.rogers.com
72.136.151.64	PTR	cpe001e2ac2ad30-cm68b6fcfa6660.cpe.net.cable.rogers.com
72.136.151.224	PTR	cpebcc810139672-cmbcc81013966f.cpe.net.cable.rogers.com
72.136.153.2	PTR	cpe7cb21b1f27a8-cm7cb21b1f27a5.cpe.net.cable.rogers.com
72.136.153.18	PTR	cpe1cabc0856a63-cm1cabc0856a60.cpe.net.cable.rogers.com
72.136.153.34	PTR	cpe00fc8d400b33-cm00fc8d400b30.cpe.net.cable.rogers.com
72.136.153.128	PTR	cpebc1401edda93-cmbc1401edda90.cpe.net.cable.rogers.com
72.136.153.177	PTR	cpebcc810098e9d-cmbcc810098e9a.cpe.net.cable.rogers.com
72.136.153.192	PTR	cpe00222d1c58e5-cm00222d1c58e1.cpe.net.cable.rogers.com
72.136.154.153	A	mail.commfield.com
72.136.155.113	PTR	cpe00222d90de60-cm00222d90de5c.cpe.net.cable.rogers.com
72.136.155.218	A	mail.antlerhill.com
72.136.157.16	PTR	cpebcc8100abca0-cmbcc8100abc9d.cpe.net.cable.rogers.com
72.136.157.32	PTR	cpe002401750e7c-cm185933fe4b8e.cpe.net.cable.rogers.com
72.136.157.99	PTR	cpe00222dc6dae3-cm00222dc6dadf.cpe.net.cable.rogers.com
72.136.157.131	PTR	cpe1859339f26ac-cm1859339f26a9.cpe.net.cable.rogers.com
72.136.159.114	PTR	cpe001818ffbf21-cm78cd8ecd4dad.cpe.net.cable.rogers.com
72.136.159.130	PTR	cpe0026f317aca8-cm0026f317aca5.cpe.net.cable.rogers.com