Robtex

Up: 204.117.80.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 204.117.88.0/22
Down right: 204.117.92.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
204.117.91.161	A	mx0.cwwmms.com
204.117.91.161	A	mail.cwwmms.com
204.117.91.161	A	mms.cwwmms.com
204.117.91.201	PTR	cwwsms.com
204.117.91.203	PTR	mms.cwwsms.com
204.117.91.203	A	wap.cwwmms.com
204.117.91.205	PTR	cwwvmail.com
204.117.91.206	PTR	static-204-117-91-206.apid.com
204.117.92.10	PTR	static-204-117-92-10.apid.com
204.117.92.16	PTR	static-204-117-92-16.apid.com
204.117.92.27	PTR	static-204-117-92-27.apid.com
204.117.92.32	PTR	static-204-117-92-32.apid.com
204.117.92.43	PTR	static-204-117-92-43.apid.com
204.117.92.66	PTR	static-204-117-92-66.apid.com
204.117.92.67	PTR	static-204-117-92-67.apid.com
204.117.92.75	PTR	static-204-117-92-75.apid.com
204.117.92.88	PTR	static-204-117-92-88.apid.com
204.117.92.99	PTR	static-204-117-92-99.apid.com
204.117.92.104	PTR	static-204-117-92-104.apid.com
204.117.92.115	PTR	static-204-117-92-115.apid.com
204.117.92.120	PTR	static-204-117-92-120.apid.com
204.117.92.121	PTR	static-204-117-92-121.apid.com
204.117.92.128	PTR	static-204-117-92-128.apid.com
204.117.92.130	PTR	static-204-117-92-130.apid.com
204.117.92.138	PTR	static-204-117-92-138.apid.com
204.117.92.139	PTR	static-204-117-92-139.apid.com
204.117.92.146	PTR	static-204-117-92-146.apid.com
204.117.92.162	PTR	static-204-117-92-162.apid.com
204.117.92.163	PTR	static-204-117-92-163.apid.com
204.117.92.187	PTR	static-204-117-92-187.apid.com
204.117.92.216	PTR	static-204-117-92-216.apid.com
204.117.92.219	PTR	static-204-117-92-219.apid.com
204.117.92.224	PTR	static-204-117-92-224.apid.com
204.117.92.227	PTR	static-204-117-92-227.apid.com
204.117.92.232	PTR	static-204-117-92-232.apid.com
204.117.92.242	PTR	static-204-117-92-242.apid.com
204.117.92.243	PTR	static-204-117-92-243.apid.com
204.117.92.251	PTR	static-204-117-92-251.apid.com
204.117.95.58	PTR	static-58.dtccom.net
204.117.95.58	A	sicpaintshop2.com
204.117.95.177	PTR	static-177.dtccom.net