Robtex

Up: 199.253.128.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 199.253.136.0/22
Down right: 199.253.140.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
199.253.137.3	A+PTR	ecomfw2-i.dg.ecom.acxiom.com
199.253.137.156	A+PTR	cat6500whec1msfc.dg.ecom.acxiom.com
199.253.137.157	A+PTR	cat6500whec2msfc.dg.ecom.acxiom.com
199.253.137.161	PTR	whecns1.ensono.com
199.253.137.161	A	ns1.dg.ecom.acxiom.com
199.253.137.162	PTR	whecns2.ensono.com
199.253.137.162	A	ns2.dg.ecom.acxiom.com
199.253.137.186	PTR	cat6500whec1msfc.ensono.com
199.253.137.187	PTR	cat6500whec2msfc.ensono.com
199.253.139.7	PTR	highway.hubgroup.com
199.253.139.21	A+PTR	ww2.cccis.com
199.253.140.81	A	egov.cityofchicago.org
199.253.140.82	A+PTR	dcap.cityofchicago.org
199.253.140.86	A	mayor.cityofchicago.org
199.253.140.87	A	chicagoshovels.org
199.253.140.90	A	care4community.com
199.253.140.132	A+PTR	gwremote.ssab.com
199.253.140.133	PTR	gwmail.ssab.com
199.253.140.133	A	schoolsinthenorthwest.com
199.253.140.133	A	schoolsinthesoutheast.com
199.253.140.136	PTR	cag.ssab.com