Robtex

Up: 66.232.80.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 66.232.80.0/23
Down right: 66.232.82.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.232.80.6	A+PTR	dns2.ctcweb.net
66.232.80.15	A	66-232-80-15.ctcweb.net
66.232.80.139	A	mail.eaglefire.org
66.232.80.170	PTR	66-232-80-170.ctcweb.net
66.232.80.170	A	boiselcd.net
66.232.80.170	A	keithsigler.com
66.232.80.172	PTR	66-232-80-172.ctcweb.net
66.232.80.172	A	keithsigler.com
66.232.80.172	A	boisetechcentral.net
66.232.80.211	A+PTR	66-232-80-211.ctcweb.net
66.232.80.227	PTR	66-232-80-227.ctcweb.net
66.232.80.227	A	mail.strategicgrowthpartners.com
66.232.80.227	A	mail.tpchousing.com
66.232.80.228	PTR	66-232-80-228.ctcweb.net
66.232.80.228	A	mail2.tpchousing.com
66.232.81.14	A+PTR	sbs.rtgis.com
66.232.81.21	A	66-232-81-21.ctcweb.net
66.232.81.32	A	66-232-81-32.ctcweb.net
66.232.81.99	A	66-232-81-99.ctcweb.net
66.232.81.197	PTR	66-232-81-197.ctcweb.net
66.232.81.197	A	pbx2.redfish-solutions.com
66.232.82.76	A	66-232-82-76.ctcweb.net
66.232.82.87	A	66-232-82-87.ctcweb.net
66.232.82.95	A	66-232-82-95.ctcweb.net
66.232.82.133	A+PTR	66-232-82-133.ctcweb.net
66.232.82.156	A	66-232-82-156.ctcweb.net
66.232.82.201	A	66-232-82-201.ctcweb.net
66.232.82.242	A	*.immersions.com
66.232.82.242	A	immersions.com
66.232.82.242	A	w2012.immersions.com
66.232.82.244	A	*.immersions.com
66.232.82.244	A	ws2012.immersions.com
66.232.82.244	A	www.immersions.com
66.232.82.249	A	66-232-82-249.ctcweb.net
66.232.82.250	A	66-232-82-250.ctcweb.net
66.232.83.13	A+PTR	66-232-83-13.ctcweb.net
66.232.83.32	A+PTR	66-232-83-32.ctcweb.net
66.232.83.41	A+PTR	66-232-83-41.ctcweb.net
66.232.83.72	A+PTR	66-232-83-72.ctcweb.net
66.232.83.114	A+PTR	66-232-83-114.ctcweb.net
66.232.83.117	A+PTR	66-232-83-117.ctcweb.net
66.232.83.126	A+PTR	66-232-83-126.ctcweb.net
66.232.83.138	A+PTR	66-232-83-138.ctcweb.net
66.232.83.141	A+PTR	66-232-83-141.ctcweb.net
66.232.83.152	A+PTR	66-232-83-152.ctcweb.net
66.232.83.207	A+PTR	66-232-83-207.ctcweb.net
66.232.83.229	A	66-232-83-229.ctcweb.net
66.232.83.237	A+PTR	66-232-83-237.ctcweb.net
66.232.83.240	A+PTR	66-232-83-240.ctcweb.net
66.232.83.243	A	66-232-83-243.ctcweb.net
66.232.83.246	A+PTR	66-232-83-246.ctcweb.net