Robtex

Up: 65.16.0.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 65.16.0.0/20
Down right: 65.16.16.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
65.16.0.0	PTR	host65-16-0-0.birch.net
65.16.0.66	PTR	host65-16-0-66.birch.net
65.16.0.128	PTR	host65-16-0-128.birch.net
65.16.0.193	PTR	host65-16-0-193.birch.net
65.16.0.195	PTR	host65-16-0-195.birch.net
65.16.1.32	PTR	host65-16-1-32.birch.net
65.16.1.33	PTR	host65-16-1-33.birch.net
65.16.1.64	PTR	host65-16-1-64.birch.net
65.16.1.128	PTR	host65-16-1-128.birch.net
65.16.1.163	PTR	host65-16-1-163.birch.net
65.16.1.225	PTR	host65-16-1-225.birch.net
65.16.3.1	PTR	host65-16-3-1.birch.net
65.16.3.33	PTR	host65-16-3-33.birch.net
65.16.3.67	PTR	host65-16-3-67.birch.net
65.16.3.98	PTR	host65-16-3-98.birch.net
65.16.3.163	PTR	host65-16-3-163.birch.net
65.16.3.192	PTR	host65-16-3-192.birch.net
65.16.3.195	PTR	host65-16-3-195.birch.net
65.16.4.154	A	easylivingcondos.com
65.16.5.34	PTR	host65-16-5-34.birch.net
65.16.5.97	PTR	host65-16-5-97.birch.net
65.16.5.99	PTR	host65-16-5-99.birch.net
65.16.5.130	PTR	host65-16-5-130.birch.net
65.16.5.162	PTR	host65-16-5-162.birch.net
65.16.5.192	PTR	host65-16-5-192.birch.net
65.16.5.224	PTR	host65-16-5-224.birch.net
65.16.6.0	PTR	host65-16-6-0.birch.net
65.16.6.2	PTR	host65-16-6-2.birch.net
65.16.6.3	PTR	host65-16-6-3.birch.net
65.16.6.32	PTR	host65-16-6-32.birch.net
65.16.6.65	PTR	host65-16-6-65.birch.net
65.16.6.67	PTR	host65-16-6-67.birch.net
65.16.6.129	PTR	host65-16-6-129.birch.net
65.16.6.163	PTR	host65-16-6-163.birch.net
65.16.6.192	PTR	host65-16-6-192.birch.net
65.16.6.194	PTR	host65-16-6-194.birch.net
65.16.6.195	PTR	host65-16-6-195.birch.net
65.16.6.224	PTR	host65-16-6-224.birch.net
65.16.7.2	PTR	host65-16-7-2.birch.net
65.16.8.97	PTR	host65-16-8-97.birch.net
65.16.8.129	PTR	host65-16-8-129.birch.net
65.16.8.163	PTR	host65-16-8-163.birch.net
65.16.8.194	PTR	host65-16-8-194.birch.net
65.16.8.195	PTR	host65-16-8-195.birch.net
65.16.9.2	PTR	host65-16-9-2.birch.net
65.16.9.3	PTR	host65-16-9-3.birch.net
65.16.9.33	PTR	host65-16-9-33.birch.net
65.16.9.66	PTR	host65-16-9-66.birch.net
65.16.9.67	PTR	host65-16-9-67.birch.net
65.16.9.162	PTR	host65-16-9-162.birch.net
65.16.9.163	PTR	host65-16-9-163.birch.net
65.16.9.193	PTR	host65-16-9-193.birch.net
65.16.10.2	PTR	host65-16-10-2.birch.net
65.16.10.33	PTR	host65-16-10-33.birch.net
65.16.10.34	PTR	host65-16-10-34.birch.net
65.16.10.96	PTR	host65-16-10-96.birch.net
65.16.10.128	PTR	host65-16-10-128.birch.net
65.16.10.129	PTR	host65-16-10-129.birch.net
65.16.10.130	PTR	host65-16-10-130.birch.net
65.16.10.162	PTR	host65-16-10-162.birch.net
65.16.10.193	PTR	host65-16-10-193.birch.net
65.16.10.194	PTR	host65-16-10-194.birch.net
65.16.11.65	PTR	host65-16-11-65.birch.net
65.16.11.67	PTR	host65-16-11-67.birch.net
65.16.11.162	PTR	host65-16-11-162.birch.net
65.16.12.0	PTR	host65-16-12-0.birch.net
65.16.14.1	PTR	host65-16-14-1.birch.net
65.16.14.97	PTR	host65-16-14-97.birch.net
65.16.14.130	PTR	host65-16-14-130.birch.net
65.16.15.140	A	mail.factorydirectcomputers.net
65.16.15.140	A	mail.factorydirectcomputers.com
65.16.20.183	PTR	host65-16-20-183.birch.net
65.16.20.247	PTR	host65-16-20-247.birch.net
65.16.22.1	PTR	host65-16-22-1.birch.net
65.16.22.65	PTR	host65-16-22-65.birch.net
65.16.22.160	PTR	host65-16-22-160.birch.net
65.16.22.163	PTR	host65-16-22-163.birch.net
65.16.22.193	PTR	host65-16-22-193.birch.net
65.16.24.189	A	irc.starlink-irc.org
65.16.26.2	PTR	host65-16-26-2.birch.net
65.16.26.3	A	mail.carterandlucas.com
65.16.26.3	A	carterandlucas.com
65.16.26.57	A	mail.pilgrimenergy.net
65.16.26.57	A	hostmaster.pilgrimenergy.net
65.16.26.86	A	mail.billyjohnsonlaw.com
65.16.26.129	A	umgllc.net
65.16.26.129	A	mail.umgllc.net
65.16.26.214	A	mail.rossharrisgroup.com
65.16.27.130	PTR	inetlocate.com
65.16.29.69	A	mail-svr1.sellbid.com
65.16.29.69	A	mail-svr1.wkdnic.biz
65.16.29.69	A	mail-svr1.ibidmotors.net
65.16.30.0	PTR	host65-16-30-0.birch.net
65.16.30.71	A	bencorbin.com
65.16.30.71	A	bobandthenightmoves.com
65.16.30.71	A	vanhornboosterclub.org
65.16.30.193	PTR	host65-16-30-193.birch.net
65.16.30.195	PTR	host65-16-30-195.birch.net
65.16.30.222	A	marketdirectemail.com
65.16.30.224	PTR	host65-16-30-224.birch.net