Robtex

Up: 64.90.96.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 64.90.96.0/25
Down right: 64.90.96.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.90.96.4	PTR	mailtest.perpetualconnections.net
64.90.96.21	PTR	h127-21.perpetualconnections.net
64.90.96.24	PTR	h127-24.perpetualconnections.net
64.90.96.25	PTR	h127-25.perpetualconnections.net
64.90.96.31	PTR	h127-31.perpetualconnections.net
64.90.96.43	PTR	h127-43.perpetualconnections.net
64.90.96.48	PTR	edge01.perpetualconnections.com
64.90.96.50	A	smarthost.perpetualconnections.com
64.90.96.55	PTR	email01.simnet.ca
64.90.96.55	A	mail.plazacorp.com
64.90.96.55	A	mail.remax-gc.com
64.90.96.57	PTR	h127-57.perpetualconnections.net
64.90.96.60	PTR	webmail3.perpetualconnections.com
64.90.96.75	A	www.itsgamescanada.com
64.90.96.75	A	starburstcoin.com
64.90.96.75	A	goldentee.ca
64.90.96.80	PTR	h127-80.perpetualconnections.net
64.90.96.89	PTR	h127-89.perpetualconnections.net
64.90.96.96	PTR	mailfw.perpetualconnections.net
64.90.96.102	PTR	h127-102.perpetualconnections.net
64.90.96.128	PTR	h127-128.perpetualconnections.net
64.90.96.130	A+PTR	ns1.perpetualconnections.com
64.90.96.130	A	97.90.64.in-addr.arpa
64.90.96.130	A	ns1.simnet.ca
64.90.96.165	PTR	h127-165.perpetualconnections.net
64.90.96.170	PTR	h127-170.perpetualconnections.net
64.90.96.177	PTR	h127-177.perpetualconnections.net
64.90.96.178	PTR	h127-178.perpetualconnections.net
64.90.96.195	PTR	h127-195.perpetualconnections.net
64.90.96.215	PTR	h127-215.perpetualconnections.net
64.90.96.229	PTR	h127-229.perpetualconnections.net
64.90.96.230	A+PTR	ns2.perpetualconnections.com
64.90.96.230	A	ns2.simnet.ca
64.90.96.230	A	ns2.perpetualconnections.net
64.90.96.231	PTR	h127-231.perpetualconnections.net
64.90.96.237	PTR	h127-237.perpetualconnections.net