Robtex

Up: 66.73.128.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 66.73.136.0/22
Down right: 66.73.140.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.73.136.1	A	dmzgateway.msdeng.com
66.73.136.2	A	ns1.msdeng.com
66.73.136.8	A	mail2.msdeng.com
66.73.136.8	A	msdweb2.msdeng.com
66.73.136.9	A	smtp.msdeng.com
66.73.136.11	A+PTR	msdweb2.msdeng.com
66.73.136.11	A	mail.msdeng.com
66.73.136.16	A	5304xl.msdeng.com
66.73.136.40	A	ww2.msdeng.com
66.73.136.50	A+PTR	www.msdeng.com
66.73.136.50	PTR	www.msdeng.net
66.73.136.50	PTR	www.msdeng.org
66.73.136.128	A	ns3.msdeng.com
66.73.136.244	A	msdmaps.msdeng.com
66.73.136.245	A+PTR	exchange.msdeng.com
66.73.136.245	A	oa.msdeng.com
66.73.136.245	A	sync.msdeng.com
66.73.136.246	A	sync.msdeng.com
66.73.136.247	A	oa.msdeng.com
66.73.136.248	A	gis.msdeng.com
66.73.136.249	A	pubmap.msdeng.com
66.73.136.250	A	ns.msdeng.com
66.73.136.254	A	msdgateway.msdeng.com
66.73.138.90	A	adsl-66-73-138-90.dsl.ipltin.ameritech.net
66.73.138.129	A	mail.moseleylabs.com
66.73.138.139	PTR	mail.alphagammadelta.org
66.73.141.84	A	66-73-141-84.ded.ameritech.net
66.73.141.130	A	66-73-141-130.ded.ameritech.net
66.73.141.137	A	66-73-141-137.ded.ameritech.net
66.73.141.147	A	66-73-141-147.ded.ameritech.net
66.73.141.167	A	66-73-141-167.ded.ameritech.net
66.73.141.174	A	66-73-141-174.ded.ameritech.net
66.73.141.175	A	66-73-141-175.ded.ameritech.net
66.73.141.180	A	66-73-141-180.ded.ameritech.net
66.73.141.205	A	66-73-141-205.ded.ameritech.net
66.73.141.219	A+PTR	66-73-141-219.ded.ameritech.net
66.73.141.224	A	66-73-141-224.ded.ameritech.net
66.73.141.249	A	66-73-141-249.ded.ameritech.net
66.73.141.252	A	66-73-141-252.ded.ameritech.net
66.73.143.130	A	66-73-143-130.ded.ameritech.net
66.73.143.138	A	66-73-143-138.ded.ameritech.net
66.73.143.148	A	66-73-143-148.ded.ameritech.net
66.73.143.149	A	66-73-143-149.ded.ameritech.net
66.73.143.150	A	66-73-143-150.ded.ameritech.net
66.73.143.156	A	66-73-143-156.ded.ameritech.net
66.73.143.162	PTR	midwestgraphics.com
66.73.143.164	A	mail.midwestgraphics.com