Robtex

Up: 66.90.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 66.90.48.0/23
Down right: 66.90.50.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.90.48.50	A+PTR	66-90-48-50.node.smartcity.net
66.90.48.70	PTR	node.smartcity.net
66.90.48.76	PTR	66-90-48-76.node.smartcity.net
66.90.48.76	PTR	static.node.smartcity.net
66.90.48.77	PTR	node.smartcity.net
66.90.48.77	A	66-90-48-77.node.smartcity.net
66.90.48.84	PTR	66-90-48-84.node.smartcity.net
66.90.48.89	PTR	66-90-48-89.node.smartcity.net
66.90.48.97	PTR	66-90-48-97.node.smartcity.net
66.90.48.173	A	66-90-48-173.node.smartcity.net
66.90.49.75	PTR	sctbizuser75.smartcity.net
66.90.50.3	PTR	node.smartcity.net
66.90.50.42	PTR	sctsoho.smartcity.net
66.90.50.161	A	mail.vworkz.com
66.90.50.203	PTR	sctsoho10.smartcity.net
66.90.50.203	A	spanishdrills.com
66.90.50.203	A	lingodrills.com
66.90.51.3	A	kiosk-filter.smartcitytelecom.com
66.90.51.5	A+PTR	citylimits.smartcitytelecom.com
66.90.51.5	PTR	ftp.smartcity.net
66.90.51.7	PTR	node.smartcity.net
66.90.51.7	A	ns1.smartcitytelecom.com
66.90.51.9	A	as400.smartcitytelecom.com
66.90.51.10	PTR	node.smartcity.net
66.90.51.21	A	demo.smartcitytelecom.com
66.90.51.28	A+PTR	mail2.smartcitytelecom.com
66.90.51.43	A	wdwbilling.com
66.90.51.50	PTR	mailtest-dc
66.90.51.50	PTR	multimedia.sct.com
66.90.51.52	PTR	node.smartcity.net
66.90.51.53	PTR	node.smartcity.net
66.90.51.62	A	ftp.smartcitytelecom.com
66.90.51.62	A	sctftp.smartcitytelecom.com
66.90.51.65	A+PTR	mail.smartcitytelecom.com
66.90.51.71	A	mail.smartcitypartners.com
66.90.51.71	A	mail.sctpartners.com
66.90.51.71	A	smartcitypartners.com
66.90.51.90	A+PTR	apmax.smartcitytelecom.com
66.90.51.93	PTR	www.smartcitytelecom.com
66.90.51.93	A	eventpathanaheim.com
66.90.51.93	A	www.smartcity.net
66.90.51.99	A	mail3.smartcitytelecom.com
66.90.51.104	A	merlin.smartcitytelecom.com
66.90.51.131	A	r2000.smartcitytelecom.com
66.90.51.165	A	mail.uscable.com
66.90.51.177	PTR	mn-d01-01-vlan777.smartcitytelecom.com
66.90.51.177	A	dizcolors.com