Robtex

Up: 66.210.160.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 66.210.160.0/23
Down right: 66.210.162.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.210.160.133	A+PTR	icnet-66-210-160-133.icnet.net
66.210.163.2	A+PTR	icnet-66-210-163-2.icnet.net
66.210.163.8	A	icnet-66-210-163-8.icnet.net
66.210.163.24	A+PTR	icnet-66-210-163-24.icnet.net
66.210.163.52	A+PTR	icnet-66-210-163-52.icnet.net
66.210.163.58	A+PTR	icnet-66-210-163-58.icnet.net
66.210.163.89	A	icnet-66-210-163-89.icnet.net
66.210.163.130	A+PTR	mail.internettechs.net
66.210.163.130	A	mail.grantorino.net
66.210.163.130	A	icnet-66-210-163-130.icnet.net
66.210.163.131	PTR	ns2.internettechs.net
66.210.163.131	A	web.internettechs.net
66.210.163.138	A+PTR	icnet-66-210-163-138.icnet.net
66.210.163.146	A+PTR	icnet-66-210-163-146.icnet.net
66.210.163.154	A+PTR	icnet-66-210-163-154.icnet.net
66.210.163.162	A+PTR	icnet-66-210-163-162.icnet.net
66.210.163.170	A+PTR	icnet-66-210-163-170.icnet.net
66.210.163.174	A+PTR	icnet-66-210-163-174.icnet.net
66.210.163.183	A+PTR	icnet-66-210-163-183.icnet.net
66.210.163.184	A+PTR	icnet-66-210-163-184.icnet.net
66.210.163.201	A+PTR	icnet-66-210-163-201.icnet.net
66.210.163.229	A+PTR	icnet-66-210-163-229.icnet.net
66.210.163.238	A+PTR	icnet-66-210-163-238.icnet.net
66.210.163.240	A+PTR	icnet-66-210-163-240.icnet.net
66.210.163.240	A	mail.intlgymnast.com
66.210.163.250	PTR	icnet-66-210-163-250.icnet.net
66.210.163.250	A	travelgalleryinc.net
66.210.163.250	A	reedcenter.com