Robtex

Up: 204.56.0.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 204.56.32.0/20
Down right: 204.56.48.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
204.56.32.65	PTR	clavin.wwcentral.com
204.56.32.66	PTR	slice.wwcentral.com
204.56.32.67	PTR	slice.wwcentral.com
204.56.32.89	A	mail.aurorawater.org
204.56.32.200	A	sunbeamtiger.com
204.56.32.200	A	www.kraghnet.com
204.56.32.200	A	kraghnet.com
204.56.46.227	A	medbizz.com
204.56.46.227	A	mail01.justconnect.com
204.56.46.236	PTR	www02.intelisysnet.com
204.56.46.236	A	geekspeakradio.com
204.56.46.240	PTR	www03.intelisysnet.com
204.56.47.102	A	phpmyadmin.microsource.com
204.56.52.98	PTR	kfx.com
204.56.52.112	PTR	ns1.groksoft.net
204.56.52.113	PTR	ns1.groksoft.net
204.56.52.114	PTR	ns1.groksoft.net
204.56.58.155	A	mail.classicmortgage.com