Robtex

Up: 168.146.64.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 168.146.72.0/22
Down right: 168.146.76.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
168.146.72.15	PTR	ns03.pearson.com
168.146.72.15	PTR	ns2.ecollege.com
168.146.72.15	A+PTR	testdns1.ecollege.com
168.146.72.35	A	images.smarthinking.com
168.146.72.36	A+PTR	care.smarthinking.com
168.146.72.36	A	www.e-tutors.com
168.146.72.36	A	e-tutors.com
168.146.72.40	A	pearsonclinical.com
168.146.72.41	A+PTR	pearsonassessments.com
168.146.72.42	PTR	pearsonassess.ca
168.146.72.42	PTR	www.pearsonassess.ca
168.146.72.43	A	helloq.com
168.146.72.43	A	www.helloq.com
168.146.72.61	A	pearsoncustom.com
168.146.72.61	A	www.pearsoncustom.net
168.146.72.61	A	pearsoncustom.org
168.146.72.66	A	quotient-adhd.com
168.146.72.72	A	sepm.pearson.com
168.146.72.74	A	vig.pearsoned.ca
168.146.72.77	PTR	chemplace.com
168.146.72.77	PTR	myphilosophylab.com
168.146.72.77	PTR	pearsonwriter.com
168.146.72.80	A+PTR	entrance.e-wsi.com
168.146.72.81	A+PTR	www.wsicommunity.com
168.146.72.98	A+PTR	www-qa.wsistudents.com
168.146.72.112	PTR	aacc.mylabsplus.com
168.146.72.112	PTR	dn1vw.redirector.mylabsplus.com
168.146.72.112	A	lbwcc.mylabsplus.com
168.146.73.23	PTR	flexiblescoring-ky.pearson.com
168.146.73.23	PTR	www.flexiblescoring-sat.pearson.com
168.146.73.23	PTR	flexiblescoring-az.pearson.com
168.146.73.25	A	royaltydirect.com
168.146.73.27	A	pearsoninform.com
168.146.73.71	PTR	marketresearch.pearson.com
168.146.73.71	PTR	policy.pearson.com
168.146.73.71	PTR	rights.pearson.com
168.146.73.72	PTR	ushemedia.pearson.com
168.146.73.72	A	pearsoncurriculum.com
168.146.73.72	A	phtexasworkbooks.com
168.146.73.86	A+PTR	dn1-instructor.vc.pearsontc.net
168.146.73.86	A	www.envisionmathca.com
168.146.73.86	A	readingstreet.com
168.146.73.90	PTR	test.ereview.pearson.com
168.146.73.90	PTR	contentmanagement.pearson.com
168.146.73.90	PTR	www.iphone.pearson.com
168.146.73.99	PTR	contentmanagementservices.pearson.com
168.146.73.99	A	mysoclab.net
168.146.73.99	A	vangopress.us
168.146.73.101	PTR	mybuslawlab.com
168.146.73.101	PTR	dn1-phheproduction.pearsoned.com
168.146.73.101	PTR	phheproduction.pearsoned.com