Robtex

Up: 66.187.192.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 66.187.208.0/21
Down right: 66.187.216.0/21

IP	Type	Hostname
66.187.208.13	A	ticketexchange.netsolve.com
66.187.208.24	PTR	mustang2.netsolve.com
66.187.208.26	A	smtp.netsolve.com
66.187.208.32	A+PTR	prowatch.netsolve.com
66.187.208.49	A	partners.netsolve.com
66.187.208.104	A+PTR	listener.netsolve.com
66.187.208.105	A+PTR	asm.netsolve.com
66.187.208.153	A	telepresencesupport.cisco-ros.com
66.187.208.154	A	map001.cisco-ros.com
66.187.208.155	A+PTR	map003.cisco-ros.com
66.187.208.157	A	map002.cisco-ros.com
66.187.208.162	A	map006.cisco-ros.com
66.187.208.212	PTR	cdn-ext-developer.cisco.com
66.187.208.212	A	cdn-ext-smtp.cisco.com
66.187.208.213	PTR	developer.cisco.com
66.187.208.213	A	cdn-old.cisco.com
66.187.208.214	A+PTR	developer.webex.com
66.187.208.215	A	szone.cisco.com
66.187.208.228	A	sdp.cisco.com
66.187.209.73	A	assure-application.cisco.com
66.187.209.85	A+PTR	assure-customer.cisco.com
66.187.209.108	A	sbsa-em7-a-db-vip.cisco.com
66.187.209.109	A	libm-em7-a-db-vip.cisco.com
66.187.209.110	A	nomu-em7-a-db-vip.cisco.com
66.187.209.114	A	amex-em7-a-db-vip.cisco.com
66.187.209.117	A	unlv-em7-a-db-vip.cisco.com
66.187.212.101	A	map007.cisco-ros.com
66.187.212.102	A	map008.cisco-ros.com
66.187.212.108	A	cmsportal.cisco.com
66.187.212.111	A	mxcluster-ao.cisco-ros.com
66.187.212.112	A	mxcluster-ao.cisco-ros.com
66.187.221.198	PTR	citrix.cisco-ros.com