Robtex

Up: 207.230.140.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 207.230.141.0/25
Down right: 207.230.141.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
207.230.141.24	A	smtp.cctoledo.clearchannel.com
207.230.141.29	PTR	ccrex1hou.clearchannel.cc
207.230.141.29	A	ccrhou.com
207.230.141.59	A+PTR	smtp.ccstlouis.clearchannel.cc
207.230.141.59	A	mail.katzfm.com
207.230.141.59	A	mail.kslz.com