Robtex

Up: 116.50.32.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 116.50.48.0/21
Down right: 116.50.56.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
116.50.50.129	PTR	bbbn13-129.bbbn.jp
116.50.51.69	A	bbbn14-069.bbbn.jp
116.50.51.80	PTR	bbbn14-080.bbbn.jp
116.50.51.124	A	bbbn14-124.bbbn.jp
116.50.53.226	A	iinan02-226.iinan-net.jp
116.50.54.23	A	iinan03-023.iinan-net.jp
116.50.56.1	PTR	116-50-56-1.mailcontrol.com
116.50.57.1	PTR	lo0.rtr01k.frcpt.net
116.50.57.19	PTR	gi0-0-758.rtr02k.mailcontrol.com
116.50.57.140	A	cluster-k.cloud.threatseeker.com
116.50.57.140	A	rp.cloud.threatseeker.com
116.50.57.140	A	emailsecurity.cloud.threatseeker.com
116.50.57.147	PTR	116-50-57-147.mailcontrol.com
116.50.57.147	A	hlfs-web-k.mailcontrol.com
116.50.57.155	A	submission-k.mailcontrol.com
116.50.57.161	PTR	116-50-57-161.mailcontrol.com
116.50.57.170	A	cpa.cluster-k.blackspider.com
116.50.57.170	A	cpa.surfcpa.com
116.50.57.170	A	asia.surfcpa.com
116.50.57.180	A	webdefence.cluster-k.websense.net
116.50.57.180	A	webdefence.cluster-k.blackspider.com
116.50.57.180	A	webdefence.cluster-k.forcepoint.net
116.50.57.190	A	cust46554-1.in.mailcontrol.com
116.50.57.190	A	mail.vls-global.net
116.50.57.190	A	mail.vls-global.com
116.50.58.1	PTR	lo0.rtr01m.mailcontrol.com
116.50.58.140	A	rp.cloud.threatseeker.com
116.50.58.140	A	emailsecurity.cloud.threatseeker.com
116.50.58.141	A	threatscope.websense.net
116.50.58.141	A	shm.gns.forcepoint.net
116.50.58.150	A	hybrid-web.global.blackspider.com
116.50.58.155	A	submission-m.mailcontrol.com
116.50.58.160	A	cluster-m.surfsrs.com
116.50.58.161	PTR	116-50-58-161.mailcontrol.com
116.50.58.161	A	pac.hybrid-web.global.blackspider.com
116.50.58.169	A	iq.global.websense.net
116.50.58.180	A	webdefence.cluster-m.websense.net
116.50.58.180	A	webdefence.cluster-m.forcepoint.net
116.50.58.180	A	webdefence.global.blackspider.com
116.50.58.181	A	query.webdefence.global.blackspider.com
116.50.58.182	A	home.webdefence.global.blackspider.com
116.50.59.147	PTR	116-50-59-147.mailcontrol.com
116.50.59.180	A	webdefence.cluster-c.websense.net
116.50.59.180	A	webdefence.cluster-c.forcepoint.net
116.50.59.190	A	mail.vls-global.net
116.50.59.190	A	mail.vls-global.com
116.50.59.211	PTR	116-50-59-211.mailcontrol.com
116.50.60.150	PTR	116-50-60-150.mailcontrol.com
116.50.60.150	A	hybrid-web.global.blackspider.com
116.50.60.161	PTR	116-50-60-161.mailcontrol.com
116.50.60.161	A	pac.hybrid-web.global.blackspider.com
116.50.60.169	PTR	116-50-60-169.mailcontrol.com
116.50.60.169	A	iq.global.websense.net
116.50.60.180	A+PTR	webdefence.cluster-r.websense.net
116.50.60.180	A	webdefence.global.blackspider.com
116.50.60.181	PTR	116-50-60-181.mailcontrol.com
116.50.60.181	A	query.webdefence.global.blackspider.com
116.50.60.182	PTR	116-50-60-182.mailcontrol.com
116.50.60.182	A	home.webdefence.global.blackspider.com
116.50.60.190	PTR	116-50-60-190.mailcontrol.com
116.50.61.1	PTR	116-50-61-1.mailcontrol.com
116.50.61.2	PTR	116-50-61-2.mailcontrol.com
116.50.61.17	PTR	116-50-61-17.mailcontrol.com
116.50.61.19	PTR	116-50-61-19.mailcontrol.com
116.50.61.34	PTR	116-50-61-34.mailcontrol.com
116.50.61.51	PTR	116-50-61-51.mailcontrol.com
116.50.61.65	PTR	116-50-61-65.mailcontrol.com
116.50.61.82	PTR	116-50-61-82.mailcontrol.com
116.50.61.97	PTR	116-50-61-97.mailcontrol.com
116.50.61.99	PTR	116-50-61-99.mailcontrol.com
116.50.61.129	PTR	116-50-61-129.mailcontrol.com
116.50.61.144	PTR	116-50-61-144.mailcontrol.com
116.50.61.147	PTR	116-50-61-147.mailcontrol.com
116.50.61.150	A	hybrid-web.global.blackspider.com
116.50.61.161	PTR	116-50-61-161.mailcontrol.com
116.50.61.161	A	pac.hybrid-web.global.blackspider.com
116.50.61.162	PTR	116-50-61-162.mailcontrol.com
116.50.61.169	A	iq.global.websense.net
116.50.61.176	PTR	116-50-61-176.mailcontrol.com
116.50.61.178	PTR	116-50-61-178.mailcontrol.com
116.50.61.180	A	webdefence.global.blackspider.com
116.50.61.180	A	webdefence.cluster-t.websense.net
116.50.61.181	A	query.webdefence.global.blackspider.com
116.50.61.182	A	home.webdefence.global.blackspider.com
116.50.61.192	PTR	116-50-61-192.mailcontrol.com
116.50.61.193	PTR	116-50-61-193.mailcontrol.com
116.50.61.194	PTR	116-50-61-194.mailcontrol.com
116.50.61.205	A	webdefence-pool-05.cluster-t.websense.net
116.50.61.206	A	webdefence-pool-06.cluster-t.websense.net
116.50.61.208	PTR	116-50-61-208.mailcontrol.com
116.50.61.211	A+PTR	hybrid-web-pool-01.cluster-t.websense.net
116.50.61.214	A	hybrid-web-pool-04.cluster-t.websense.net
116.50.61.227	PTR	116-50-61-227.mailcontrol.com
116.50.61.240	PTR	116-50-61-240.mailcontrol.com
116.50.61.241	PTR	116-50-61-241.mailcontrol.com
116.50.62.2	PTR	116-50-62-2.mailcontrol.com
116.50.62.3	PTR	116-50-62-3.mailcontrol.com
116.50.62.4	PTR	116-50-62-4.mailcontrol.com
116.50.62.16	PTR	116-50-62-16.mailcontrol.com
116.50.62.32	PTR	116-50-62-32.mailcontrol.com
116.50.62.49	PTR	116-50-62-49.mailcontrol.com
116.50.62.64	PTR	116-50-62-64.mailcontrol.com
116.50.62.98	PTR	116-50-62-98.mailcontrol.com
116.50.62.114	PTR	116-50-62-114.mailcontrol.com
116.50.62.129	PTR	116-50-62-129.mailcontrol.com
116.50.62.161	PTR	116-50-62-161.mailcontrol.com
116.50.62.176	PTR	116-50-62-176.mailcontrol.com
116.50.62.179	PTR	116-50-62-179.mailcontrol.com
116.50.62.194	PTR	116-50-62-194.mailcontrol.com
116.50.62.208	PTR	116-50-62-208.mailcontrol.com
116.50.62.209	PTR	116-50-62-209.mailcontrol.com
116.50.62.211	PTR	116-50-62-211.mailcontrol.com
116.50.62.224	PTR	116-50-62-224.mailcontrol.com
116.50.62.225	PTR	116-50-62-225.mailcontrol.com
116.50.62.227	PTR	116-50-62-227.mailcontrol.com
116.50.62.241	PTR	116-50-62-241.mailcontrol.com
116.50.63.1	PTR	116-50-63-1.mailcontrol.com
116.50.63.3	PTR	116-50-63-3.mailcontrol.com
116.50.63.33	PTR	116-50-63-33.mailcontrol.com
116.50.63.128	PTR	116-50-63-128.mailcontrol.com
116.50.63.144	PTR	116-50-63-144.mailcontrol.com
116.50.63.176	PTR	116-50-63-176.mailcontrol.com
116.50.63.193	PTR	116-50-63-193.mailcontrol.com
116.50.63.194	PTR	116-50-63-194.mailcontrol.com
116.50.63.209	PTR	116-50-63-209.mailcontrol.com
116.50.63.211	PTR	116-50-63-211.mailcontrol.com
116.50.63.225	PTR	116-50-63-225.mailcontrol.com
116.50.63.227	PTR	116-50-63-227.mailcontrol.com
116.50.63.242	PTR	116-50-63-242.mailcontrol.com