Robtex

Up: 216.166.16.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 216.166.16.0/24
Down right: 216.166.17.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.166.16.1	PTR	216-166-16-1.fwd.datafoundry.com
216.166.16.13	PTR	216-166-16-13.fwd.datafoundry.com
216.166.16.36	A+PTR	ironport.arthrocare.com
216.166.16.38	PTR	216-166-16-38.fwd.datafoundry.com
216.166.16.38	A	wmail.arthrocare.com
216.166.16.42	A+PTR	216-166-16-42.fwd.datafoundry.com
216.166.16.42	A	connect.arthrocare.com
216.166.16.42	A	www.arthrocare.com
216.166.16.44	A	devicereimbursement.com
216.166.16.46	A	arthrocarelabs.com
216.166.16.47	PTR	216-166-16-47.fwd.datafoundry.com
216.166.16.47	A	arthrocare.dk
216.166.16.47	A	arthrocareinternational.com
216.166.16.51	A+PTR	smtp.arthrocare.com
216.166.16.51	A	smtp2.arthrocare.com
216.166.16.51	A	216-166-16-51.fwd.datafoundry.com
216.166.16.77	A+PTR	216-166-16-77.fwd.datafoundry.com
216.166.16.86	A+PTR	216-166-16-86.fwd.datafoundry.com
216.166.16.86	A	cfabogados.com
216.166.16.86	A	venio.com.mx
216.166.16.101	PTR	pdfcomplete.com
216.166.16.101	A	ondocs.com
216.166.16.101	A	www.pdfcomplete.com
216.166.16.103	A	support.pdfcomplete.com
216.166.16.105	PTR	216-166-16-105.fwd.datafoundry.com
216.166.16.109	PTR	216-166-16-109.fwd.datafoundry.com
216.166.16.111	A	srv10.pdfcomplete.com
216.166.16.121	A	mail.pdfcomplete.com
216.166.16.132	PTR	216-166-16-132.fwd.datafoundry.com
216.166.16.132	A	srv11.pdfcomplete.com
216.166.16.134	A+PTR	216-166-16-134.fwd.datafoundry.com
216.166.16.163	A+PTR	mail2.costep.org
216.166.17.17	PTR	216-166-17-17.fwd.datafoundry.com
216.166.17.17	A	kanaly.com
216.166.17.17	A	www.kanaly.com
216.166.17.33	A	mail.straightedgehosting.com
216.166.17.67	A+PTR	mx1.allclearid.com
216.166.17.68	A+PTR	mx2.allclearid.com
216.166.17.69	A	mx3.allclearid.com
216.166.17.80	PTR	www.allclearid.com
216.166.17.81	A+PTR	my.allclearid.com
216.166.17.83	A+PTR	enroll.allclearid.com
216.166.17.85	A+PTR	www.debix.com
216.166.17.85	A	debix.com
216.166.17.86	A+PTR	support.debix.com
216.166.17.87	PTR	216-166-17-87.fwd.datafoundry.com
216.166.17.90	PTR	www.acid-qa.com
216.166.17.92	PTR	callcenter.dbx-qa.com
216.166.17.93	PTR	enroll.acid-qa.com
216.166.17.94	PTR	apim.acid-qa.com
216.166.17.95	A+PTR	www.dbx-qa.com
216.166.17.95	A	dbx-qa.com
216.166.17.96	PTR	support.dbx-qa.com
216.166.17.181	A+PTR	216-166-17-181.fwd.datafoundry.com
216.166.17.185	A	uberminx.com
216.166.17.191	PTR	216-166-17-191.fwd.datafoundry.com
216.166.17.191	A	momaenterprise.com
216.166.17.192	PTR	216-166-17-192.fwd.datafoundry.com
216.166.17.192	A	blog.wefeelsecure.com
216.166.17.192	A	wefeelsecure.com
216.166.17.197	A+PTR	216-166-17-197.fwd.datafoundry.com
216.166.17.207	PTR	216-166-17-207.fwd.datafoundry.com
216.166.17.209	A+PTR	216-166-17-209.fwd.datafoundry.com
216.166.17.209	A	00mobile009.com
216.166.17.210	PTR	216-166-17-210.fwd.datafoundry.com
216.166.17.222	PTR	216-166-17-222.fwd.datafoundry.com
216.166.17.222	A	00mobile002.com
216.166.17.223	PTR	216-166-17-223.fwd.datafoundry.com
216.166.17.223	A	00mobile003.com
216.166.17.224	PTR	216-166-17-224.fwd.datafoundry.com
216.166.17.224	A	00mobile004.com
216.166.17.225	PTR	216-166-17-225.fwd.datafoundry.com
216.166.17.225	A	00mobile005.com
216.166.17.226	A+PTR	216-166-17-226.fwd.datafoundry.com
216.166.17.226	A	00mobile006.com
216.166.17.227	PTR	216-166-17-227.fwd.datafoundry.com
216.166.17.228	A+PTR	216-166-17-228.fwd.datafoundry.com
216.166.17.228	A	00mobile008.com
216.166.17.232	PTR	216-166-17-232.fwd.datafoundry.com
216.166.17.232	A	spyese.com
216.166.17.252	PTR	216-166-17-252.fwd.datafoundry.com
216.166.17.252	A	111-222-333-444.com
216.166.17.252	A	www.mobilefonex.com
216.166.17.253	PTR	216-166-17-253.fwd.datafoundry.com
216.166.17.254	PTR	216-166-17-254.fwd.datafoundry.com
216.166.17.254	A	mobilebackup.biz