Robtex

Up: 204.253.48.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 204.253.48.0/25
Down right: 204.253.48.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
204.253.48.130	A+PTR	ns2.bizquest.com
204.253.48.130	A+PTR	ns2.costar.com
204.253.48.130	A	ns2.bizbuysell.net
204.253.48.134	A	ns4.costar.com
204.253.48.137	A	sdmailgw1.costar.com
204.253.48.140	PTR	costargroup.com
204.253.48.140	A+PTR	www2.costar.com
204.253.48.140	PTR	www.costargroup.com
204.253.48.154	A	gateway-04.costar.com
204.253.48.156	A+PTR	property-04.costar.com
204.253.48.156	A+PTR	property2.costar.com
204.253.48.160	PTR	wwx.comps.com
204.253.48.160	A+PTR	pds2.costar.com
204.253.48.160	A+PTR	pds4.costar.com
204.253.48.162	A+PTR	updates-04.costar.com
204.253.48.162	PTR	sdusweb2.usweb.costar.local
204.253.48.162	A	updates.costar-prd.akadns.net
204.253.48.172	A	product2.costar.com
204.253.48.172	A	www.aresforact.com
204.253.48.191	PTR	sdiwebimage2.sd.costar.com
204.253.48.191	A	lnwings01.loopnet.com
204.253.48.192	A+PTR	pdsusercontentimport4.costar.com
204.253.48.192	PTR	sdifilerep1.sd.costar.com
204.253.48.192	A	sdiwebimage2.sd.costar.com
204.253.48.205	A+PTR	bbs04lsv1.bizbuysell.com
204.253.48.206	A+PTR	bq04lsv1.bizquest.com
204.253.48.206	A	bqlsv01.bizquest.com
204.253.48.207	A+PTR	laf04lsv1.landandfarm.com
204.253.48.207	PTR	sdisqlrep2.sd.costar.com
204.253.48.209	A	lnlsv02.loopnet.com
204.253.48.210	A+PTR	sdiwebprd1.sd.costar.com
204.253.48.210	A+PTR	loa04lsv1.landsofamerica.com
204.253.48.221	A+PTR	mxa3.frostypuppy.com
204.253.48.221	A+PTR	sdireport2.sd.costar.com
204.253.48.221	A	mxa3.costar.com
204.253.48.223	A+PTR	mxa4.frostypuppy.com
204.253.48.223	A+PTR	sdireport4.sd.costar.com
204.253.48.223	A	mxa4.costar.com
204.253.48.227	A+PTR	cg04pfagprd501.costar.com
204.253.48.227	A	mx3.costar.com
204.253.48.228	A+PTR	cg04pfagprd502.costar.com
204.253.48.228	A	mx4.costar.com