Robtex

Up: 66.255.200.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 66.255.200.0/25
Down right: 66.255.200.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.255.200.0	PTR	0.200.255.66.unassigned.i2k.net
66.255.200.3	A+PTR	onramp.i2k.com
66.255.200.3	A	i2k.com
66.255.200.3	A	ns1.thinkextreme.com
66.255.200.5	A+PTR	offramp.i2k.com
66.255.200.5	A	ns2.thinkextreme.com
66.255.200.7	A	mailback.i2k.com
66.255.200.9	A+PTR	webs.i2k.com
66.255.200.9	A	cedarlodge.com
66.255.200.9	A	awin-sandsmotel.com
66.255.200.11	A+PTR	scurve.i2k.com
66.255.200.11	A	hollandgroupstore.trophymuskegon.com
66.255.200.11	A	www.tucs.org
66.255.200.13	PTR	crm.i2k.com
66.255.200.13	A	web2.i2k.com
66.255.200.18	A+PTR	mail.i2k.com
66.255.200.18	A	mail.thinkextreme.net
66.255.200.18	A	ms.i2k.com
66.255.200.21	PTR	mx01.i2k.com
66.255.200.27	PTR	nwebs.i2k.com.200.255.66.in-addr.arpa
66.255.200.27	A	www.tucs.org
66.255.200.27	A	tucs.org