Robtex

Up: 204.16.168.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 204.16.169.0/25
Down right: 204.16.169.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
204.16.169.1	PTR	abuse-sinkhole.changeip.com
204.16.169.2	PTR	abuse-sinkhole.changeip.com
204.16.169.2	A	easyudsecure.com
204.16.169.2	A	wikimail.epac.to
204.16.169.3	PTR	abuse-sinkhole.changeip.com
204.16.169.11	PTR	abuse-sinkhole.changeip.com
204.16.169.44	PTR	abuse-sinkhole.changeip.com
204.16.169.130	PTR	unknown.sandiegobroadband.com
204.16.169.130	A	sanmarcosweb.com
204.16.169.225	PTR	unknown.sandiegobroadband.com