Robtex

Up: 64.140.168.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 64.140.172.0/23
Down right: 64.140.174.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.140.172.1	PTR	ip-140-172-1.aguila.tabletoptelephone.com
64.140.172.14	PTR	ip-140-172-14.aguila.tabletoptelephone.com
64.140.172.30	PTR	64-140-172-30.static.webnx.com
64.140.172.38	PTR	64-140-172-38.static.webnx.com
64.140.172.48	PTR	64-140-172-48.static.webnx.com
64.140.172.50	PTR	64-140-172-50.static.webnx.com
64.140.172.50	A	sah-ogden.com
64.140.172.61	PTR	64-140-172-61.static.webnx.com
64.140.172.78	PTR	64-140-172-78.static.webnx.com
64.140.172.83	PTR	64-140-172-83.static.webnx.com
64.140.172.96	PTR	64-140-172-96.static.webnx.com
64.140.172.101	PTR	64-140-172-101.static.webnx.com
64.140.172.108	PTR	64-140-172-108.static.webnx.com
64.140.172.131	PTR	64-140-172-131.static.webnx.com
64.140.172.140	PTR	64-140-172-140.static.webnx.com
64.140.172.156	PTR	64-140-172-156.static.webnx.com
64.140.172.173	PTR	64-140-172-173.static.webnx.com
64.140.172.182	PTR	64-140-172-182.static.webnx.com
64.140.172.185	PTR	64-140-172-185.static.webnx.com
64.140.172.189	PTR	64-140-172-189.static.webnx.com
64.140.172.195	PTR	64-140-172-195.static.webnx.com
64.140.172.212	PTR	64-140-172-212.static.webnx.com
64.140.172.215	PTR	64-140-172-215.static.webnx.com
64.140.172.222	PTR	64-140-172-222.static.webnx.com
64.140.172.236	PTR	64-140-172-236.static.webnx.com
64.140.172.238	PTR	64-140-172-238.static.webnx.com
64.140.172.240	PTR	ip-140-172-240.aguila.tabletoptelephone.com
64.140.172.254	PTR	64-140-172-254.static.webnx.com
64.140.174.90	A+PTR	ogd1-speedtest.zx4.com
64.140.174.90	A	ogd1a-speedtest.zx4.com
64.140.174.139	A	blargolis.com
64.140.174.226	PTR	64-140-174-226.static.webnx.com
64.140.174.226	A	mail.aznv.tv
64.140.174.227	A	content.aznv.tv
64.140.174.229	A	p1.aznv.tv
64.140.174.232	A	f3.aznv.tv
64.140.174.233	A	p3.aznv.tv
64.140.174.234	A	p4.aznv.tv
64.140.174.236	A	p8.aznv.tv
64.140.174.237	PTR	64-140-174-237.static.webnx.com
64.140.174.237	A	p9.aznv.tv
64.140.174.238	A	p5.aznv.tv
64.140.174.239	A	p6.aznv.tv
64.140.175.122	PTR	64-140-175-122.static.webnx.com
64.140.175.122	A	ns6.nutracorp.com
64.140.175.130	A	vpn.standard.net
64.140.175.181	PTR	64-140-175-181.static.webnx.com
64.140.175.181	A	e.standard.net
64.140.175.183	PTR	64-140-175-183.static.webnx.com
64.140.175.183	A	stainedglasssupplystore.org
64.140.175.183	A	sweetwaterpark.org
64.140.175.187	PTR	64-140-175-187.static.webnx.com
64.140.175.187	A	www.hilltoptimes.com
64.140.175.187	A	mail.worldsbestshutters.com