Robtex

Up: 144.160.96.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 144.160.112.0/21
Down right: 144.160.120.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
144.160.112.7	A+PTR	daflt6pc-1.attdns.net
144.160.112.12	A+PTR	egssmtp01.att.com
144.160.112.13	A	egssmtp04.att.com
144.160.112.14	A	egssmtp01b.att.com
144.160.112.16	A+PTR	sbcsmtp2.sbc.com
144.160.112.16	A	mxfailover.att.com
144.160.112.17	A+PTR	txshush1.sbc.com
144.160.112.22	A+PTR	ns1.attdns.com
144.160.112.120	A+PTR	gd1b.attdns.com
144.160.113.153	A	re-a1.att.com
144.160.113.155	A	re-a2.att.com
144.160.113.161	A	re-a5.att.com
144.160.113.169	A	re-a9.att.com
144.160.113.171	A	re-a10.att.com
144.160.113.173	A	re-a21.att.com
144.160.113.184	A	re-pvt-d1.att.com
144.160.113.225	A	opusmobiled12.att.net
144.160.113.252	A	opusmobiled10.att.net
144.160.115.224	A+PTR	origin-prdidp-dadc.att.com
144.160.115.225	A+PTR	origin-idpssaf-dadc.att.com
144.160.115.226	A+PTR	origin-idp2-dadc.att.com
144.160.116.166	A+PTR	cbusdevsmtp06.att.com
144.160.116.167	A+PTR	cbusdevsmtp05.att.com
144.160.117.226	A+PTR	origin-idp-dadc.att.com
144.160.117.228	A+PTR	elasmtp01b.att.com
144.160.117.229	A+PTR	elasmtp01c.att.com
144.160.117.230	A+PTR	elasmtp01d.att.com
144.160.117.232	A	origin-idp-dadc.att.com
144.160.117.233	A	origin-idp-dadc.att.com
144.160.117.234	A	origin-idp-dadc.att.com
144.160.117.250	A+PTR	firstnet-preview.att.com
144.160.117.252	A+PTR	elasmtp01.att.com
144.160.122.77	A+PTR	itovideo.att.com
144.160.125.15	A+PTR	csi-bau-ext-dadc.att.com
144.160.125.42	A+PTR	btn.sbcis.sbc.com
144.160.125.43	A+PTR	oss.att.com
144.160.125.45	A	tis.sbc.mps.attdns.net
144.160.125.45	A	tis.sbc.com
144.160.125.46	PTR	sbcreg.mps.attdns.net
144.160.125.53	A	lsreg.sbcis.sbc.com
144.160.125.57	A	lsreg.mps.attdns.net
144.160.125.58	A	tis.att.mps.attdns.net
144.160.125.59	A	attreg.mps.attdns.net
144.160.125.66	A+PTR	olmtraindmz.cingular.com
144.160.125.67	A+PTR	purchasingdev1.att.com
144.160.125.69	A+PTR	gslb5a.attdns.com
144.160.125.71	A	gslb5b.attdns.com
144.160.125.93	A+PTR	fcontent-da.att.com
144.160.125.93	A	fcontent.att.com
144.160.125.94	A+PTR	bc-da.att.com
144.160.125.94	PTR	premier-da.att.com
144.160.125.94	PTR	geo-da.att.com
144.160.125.160	A	mydesktop-central01u.att.com
144.160.125.161	A	mydesktop-central02u.att.com
144.160.125.165	A	mydesktop-central06u.att.com
144.160.125.188	A+PTR	dlifeapiaccess-da.att.com
144.160.125.190	A+PTR	cprodx-da.att.net
144.160.125.191	A+PTR	loginprodxc-da.att.net
144.160.125.192	A+PTR	enterprise-clogin-da.att.com
144.160.125.194	A+PTR	cprodx-da.att.com
144.160.125.199	A+PTR	my-digitallife-da.att.com
144.160.125.201	A+PTR	claccess-da.att.net
144.160.125.212	A+PTR	fhclm.att.com
144.160.125.212	A	foauthaccess.att.com
144.160.125.218	A+PTR	xoauthaccess-dl.att.com
144.160.125.218	A	xoauthaccess.att.com
144.160.125.221	PTR	otserviceprfp2.att.com
144.160.125.225	A	bcontent.att.com
144.160.125.227	A	oidc.idp.blogin.att.com
144.160.125.228	A	samlsp.idp.blogin.att.com
144.160.125.233	A	myattlog.att.com
144.160.127.10	A+PTR	apiloginda.att.com
144.160.127.10	A	apilogin.att.com
144.160.127.11	PTR	cprodx-myatt.att.com
144.160.127.11	PTR	cprodx1.att.com
144.160.127.11	A+PTR	uversecentral-bpe.att.com
144.160.127.12	PTR	cprodctnxsf.att.net
144.160.127.17	A	c-networkauth.att.com
144.160.127.18	A	loginprodx.att.net
144.160.127.19	A+PTR	cprodx.att.net
144.160.127.22	A	tguardmblxda.att.com
144.160.127.32	A	dlifeapiaccess.att.com