Robtex

Up: 199.188.128.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 199.188.136.0/22
Down right: 199.188.140.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
199.188.136.6	A	e1.cr.eh.tucson.getsprocket.net
199.188.136.102	PTR	e1.cr.nogales.getsprocket.net
199.188.136.162	A+PTR	cr.tubac.getsprocket.net
199.188.136.218	A	smtp3.kk-intl.com
199.188.137.9	A+PTR	ns.getsprocket.net
199.188.137.9	A	mysprocketmail.com
199.188.137.9	A	quikmartstores.com
199.188.137.10	PTR	ns2.getsprocket.net
199.188.137.11	PTR	ns5.getsprocket.net
199.188.137.19	A+PTR	voip1.tucson.getsprocket.net
199.188.137.25	A+PTR	myportal.getsprocket.net
199.188.138.42	A	mail.dpddesign.com
199.188.138.141	A	1docs.com
199.188.138.141	A	webhiway.net
199.188.138.141	A	airhiway.com
199.188.138.143	A	newshighway.net
199.188.138.144	PTR	ip144.webhiway.com
199.188.138.144	A	webhighway.org
199.188.138.144	A	webhiway.com
199.188.138.145	A	wispassoc.com