Robtex

Up: 66.47.0.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 66.47.4.0/23
Down right: 66.47.6.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.47.4.12	A+PTR	user-112u10c.biz.mindspring.com
66.47.4.99	A	*.computronics.com
66.47.4.99	A	*.styka.com
66.47.4.99	A	*.logmon.com
66.47.4.102	A+PTR	mail.computronics.com
66.47.4.102	A	mail.maryqueen.org
66.47.4.102	A	mail.logmon.com
66.47.4.103	PTR	www.computronics.com
66.47.4.104	A	www.maryqueen.org
66.47.4.104	A	mqh.computronics.com
66.47.4.104	A	maryqueen.org
66.47.4.105	PTR	www.logmon.com
66.47.4.105	A	logmon.com
66.47.4.106	PTR	www.styka.com
66.47.4.110	PTR	gw.computron.com
66.47.4.110	A	gw.computronics.com
66.47.4.110	A	gw.styka.com
66.47.4.112	A	ginkgoscarf.com
66.47.4.117	A	acousticren.com
66.47.4.120	PTR	compsrv2.computron.com
66.47.4.120	A	mail.maryqueen.org
66.47.4.120	A	mail.acousticren.com
66.47.6.1	A	user-112u1g1.biz.mindspring.com
66.47.6.243	A+PTR	user-112u1nj.biz.mindspring.com