Robtex

Up: 189.217.240.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 189.217.248.0/22
Down right: 189.217.252.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
189.217.249.4	PTR	customer-189-217-249-4.cablevision.net.mx
189.217.253.0	PTR	customer-189-217-253-0.cablevision.net.mx
189.217.253.1	PTR	customer-189-217-253-1.cablevision.net.mx
189.217.253.8	PTR	customer-189-217-253-8.cablevision.net.mx
189.217.253.9	PTR	customer-189-217-253-9.cablevision.net.mx
189.217.253.18	PTR	customer-189-217-253-18.cablevision.net.mx
189.217.253.48	PTR	customer-189-217-253-48.cablevision.net.mx
189.217.253.65	PTR	customer-189-217-253-65.cablevision.net.mx
189.217.253.67	PTR	customer-189-217-253-67.cablevision.net.mx
189.217.253.80	PTR	customer-189-217-253-80.cablevision.net.mx
189.217.253.83	PTR	customer-189-217-253-83.cablevision.net.mx
189.217.253.88	PTR	customer-189-217-253-88.cablevision.net.mx
189.217.253.89	PTR	customer-189-217-253-89.cablevision.net.mx
189.217.253.90	PTR	customer-189-217-253-90.cablevision.net.mx
189.217.253.96	PTR	customer-189-217-253-96.cablevision.net.mx
189.217.253.104	PTR	customer-189-217-253-104.cablevision.net.mx
189.217.253.113	PTR	customer-189-217-253-113.cablevision.net.mx
189.217.253.115	PTR	customer-189-217-253-115.cablevision.net.mx
189.217.253.120	PTR	customer-189-217-253-120.cablevision.net.mx
189.217.253.122	PTR	customer-189-217-253-122.cablevision.net.mx
189.217.253.123	PTR	customer-189-217-253-123.cablevision.net.mx
189.217.253.130	PTR	customer-189-217-253-130.cablevision.net.mx
189.217.253.139	PTR	customer-189-217-253-139.cablevision.net.mx
189.217.253.154	PTR	customer-189-217-253-154.cablevision.net.mx
189.217.253.176	PTR	customer-189-217-253-176.cablevision.net.mx
189.217.253.184	PTR	customer-189-217-253-184.cablevision.net.mx
189.217.253.186	PTR	customer-189-217-253-186.cablevision.net.mx
189.217.253.201	PTR	customer-189-217-253-201.cablevision.net.mx
189.217.253.210	PTR	customer-189-217-253-210.cablevision.net.mx
189.217.253.235	PTR	customer-189-217-253-235.cablevision.net.mx
189.217.253.240	PTR	customer-189-217-253-240.cablevision.net.mx
189.217.253.242	PTR	customer-189-217-253-242.cablevision.net.mx
189.217.254.15	A	mailsvr.absystems.biz
189.217.254.31	A	mail.climateinstitute.info
189.217.254.91	PTR	customer-189-217-254-91.cablevision.net.mx
189.217.254.91	A	mail.sicamsa.com.mx
189.217.254.91	A	543912.sicamsa.com.mx
189.217.254.136	PTR	customer-189-217-254-136.cablevision.net.mx
189.217.255.104	PTR	customer-189-217-255-104.cablevision.net.mx
189.217.255.137	PTR	customer-189-217-255-137.cablevision.net.mx