Robtex

Up: 206.196.122.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 206.196.123.0/25
Down right: 206.196.123.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
206.196.123.8	A+PTR	nospam.fracrack.com
206.196.123.10	A	cloud.fracrack.com
206.196.123.31	PTR	ns1.stltoday.com
206.196.123.32	PTR	ns2.stltoday.com
206.196.123.34	PTR	home.stltoday.com
206.196.123.34	A	yourjournal.com
206.196.123.34	A	www.readjo.com
206.196.123.35	PTR	interact.stltoday.com
206.196.123.36	PTR	blackhole.stltoday.com