Robtex

Up: 116.50.58.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 116.50.59.0/25
Down right: 116.50.59.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
116.50.59.47	PTR	116-50-59-47.mailcontrol.com
116.50.59.147	PTR	116-50-59-147.mailcontrol.com
116.50.59.149	PTR	116-50-59-149.mailcontrol.com
116.50.59.150	PTR	116-50-59-150.mailcontrol.com
116.50.59.169	PTR	116-50-59-169.mailcontrol.com
116.50.59.180	A+PTR	webdefence.cluster-c.forcepoint.net
116.50.59.180	A	webdefence.cluster-c.websense.net
116.50.59.190	PTR	cluster-c.mailcontrol.com
116.50.59.190	A	mail.vls-global.net
116.50.59.190	A	mail.vls-global.com
116.50.59.201	PTR	116-50-59-201.mailcontrol.com
116.50.59.211	PTR	116-50-59-211.mailcontrol.com
116.50.59.223	PTR	mail-03-c.mailcontrol.com
116.50.59.230	PTR	116-50-59-230.mailcontrol.com
116.50.59.231	PTR	116-50-59-231.mailcontrol.com
116.50.59.232	PTR	116-50-59-232.mailcontrol.com
116.50.59.233	PTR	116-50-59-233.mailcontrol.com
116.50.59.234	PTR	116-50-59-234.mailcontrol.com