Robtex

Up: 12.144.20.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 12.144.20.0/24
Down right: 12.144.21.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
12.144.20.13	A+PTR	smtpexpress.duanemorris.com
12.144.20.17	PTR	mx13.duanemorris.com
12.144.20.28	A	adfs.duanemorris.com
12.144.20.32	A+PTR	nypbx.duanemorris.com
12.144.20.48	A+PTR	dmtrust.com
12.144.20.49	A	ftp.duanemorris.com
12.144.20.50	A+PTR	duanemorris.com
12.144.20.50	A	duanemorris.org
12.144.20.50	A	duanemorris.net
12.144.20.51	PTR	lcsap.duanemorris.com
12.144.20.53	A+PTR	inmagic.duanemorris.com
12.144.20.55	PTR	oldseconderisasettlement.com
12.144.20.55	A	wescottfinancial.com
12.144.20.55	A	wescottadvisors.com
12.144.20.56	A+PTR	wescottglobal.com
12.144.20.57	A+PTR	publicaffairsmgt.com
12.144.20.57	A	duanemorrisgovernmentaffairs.com
12.144.20.60	PTR	intellinet.duanemorris.com
12.144.20.64	A+PTR	wscx.com
12.144.20.66	A+PTR	litcentre.com
12.144.20.68	A+PTR	phlexpe01.duanemorris.com
12.144.20.71	PTR	wescottbpi.com
12.144.20.71	PTR	wescottbrand.com
12.144.20.71	A+PTR	wescottbrandprotectioninternational.com
12.144.20.72	A	stats.duanemorris.com
12.144.20.75	PTR	worksite.duanemorris.com
12.144.20.78	PTR	bh.duanemorris.com
12.144.20.79	PTR	cleverpay.rg2claims.com
12.144.20.79	A	cleverpay.com
12.144.20.81	PTR	wescottprofpub.com
12.144.20.81	A	taxaccountinggroup.com
12.144.20.81	A	dmtaxaccountinggroup.com
12.144.20.88	A+PTR	login.duanemorris.com
12.144.20.92	A+PTR	phlwww02.duanemorris.com
12.144.20.95	A+PTR	mycitrixnew.duanemorris.com
12.144.20.97	A+PTR	selfapply.duanemorris.com
12.144.20.115	A+PTR	patent-watch.duanemorris.com
12.144.20.117	PTR	intellinet.wescotttechservices.com
12.144.20.129	A+PTR	iconect.wescotttechservices.com
12.144.20.149	A+PTR	contactverifier.duanemorris.com
12.144.20.166	A+PTR	techlaw10.com
12.144.20.167	PTR	rg2claims.com
12.144.20.170	A+PTR	datafeed.hpix-ins.com
12.144.20.174	A+PTR	myaccount.duanemorris.com
12.144.20.193	A+PTR	apotex-pwp.duanemorris.com
12.144.20.194	A+PTR	dealerlegalservices.com
12.144.20.194	A	dmdealerservices.com
12.144.20.194	A	dmdealerlaw.com
12.144.20.206	A+PTR	sslvpn.duanemorris.com
12.144.20.223	A+PTR	dmga.com
12.144.20.223	A	www.dmga.com
12.144.20.224	A	verdatum.duanemorris.com
12.144.20.230	A+PTR	vaccess.duanemorris.com
12.144.20.233	A	livemeeting.duanemorris.com
12.144.20.243	PTR	cwa.duanemorris.com
12.144.20.246	PTR	mx10.duanemorris.com
12.144.20.246	A	mail.duanemorris.com
12.144.20.247	PTR	mx11.duanemorris.com
12.144.20.247	A	mail.duanemorris.com
12.144.20.248	PTR	mx12.duanemorris.com
12.144.20.248	A	mail.duanemorris.com
12.144.20.249	A	phlvcse01.duanemorris.com
12.144.20.254	A+PTR	dmnet.duanemorris.com
12.144.21.3	PTR	fw.duanemorris.com
12.144.21.10	A+PTR	join2.duanemorris.com