Robtex

Up: 66.210.0.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 66.210.4.0/23
Down right: 66.210.6.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.210.4.7	PTR	wsip-66-210-4-7.tu.ph.cox.net
66.210.4.7	A	www.uniteddrugs.com
66.210.4.7	A	areterx.com
66.210.4.18	A	mail_cox.areterx.com
66.210.4.42	PTR	wsip-66-210-4-42.tu.ph.cox.net
66.210.4.101	A	mail.liberty.k12.az.us
66.210.4.237	PTR	wsip-66-210-4-237.tu.ph.cox.net
66.210.5.90	PTR	ares.vazio.com
66.210.5.133	A+PTR	wsip-66-210-5-133.tc.ph.cox.net
66.210.5.136	A+PTR	wsip-66-210-5-136.tc.ph.cox.net
66.210.5.162	PTR	wsip-66-210-5-162.tc.ph.cox.net
66.210.5.162	A	dns2.cfsd.k12.az.us
66.210.5.163	A+PTR	wsip-66-210-5-163.tc.ph.cox.net
66.210.5.163	A	dns.cfsd.k12.az.us
66.210.6.7	PTR	wsip-66-210-6-7.tu.ph.cox.net
66.210.6.20	PTR	mail.tucsonairport.org
66.210.6.22	PTR	tucsonairport.org
66.210.6.84	PTR	olgc.com
66.210.6.84	A	ftp.olgc.com
66.210.6.86	A	mars.olgc.com
66.210.6.87	PTR	rcam.olgc.com
66.210.6.88	PTR	rcamolgc.com
66.210.6.88	A+PTR	poseidon.olgc.com
66.210.6.89	A	capstonetherapeutics.com
66.210.6.207	PTR	wsip-66-210-6-207.tu.ph.cox.net
66.210.7.9	A	server.dilas-inc.com
66.210.7.66	A+PTR	svps.k12.az.us
66.210.7.67	A	exchange.svps.k12.az.us
66.210.7.71	PTR	mail.svps.k12.az.us
66.210.7.90	A	sierravistapublicschools.net
66.210.7.98	PTR	wsip-66-210-7-98.tu.ph.cox.net
66.210.7.98	A	www.kinotox.net
66.210.7.98	A	www.kinotox.com
66.210.7.110	A	healthysolutionsweb.net