Robtex

Up: 204.16.232.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 204.16.236.0/23
Down right: 204.16.238.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
204.16.236.14	A	vpn.1800contacts.com
204.16.237.19	A	mail01.1800contacts.com
204.16.237.21	A	mail02.1800contacts.com
204.16.237.25	A	a.nodnsavailableforthis.com
204.16.237.26	A	b.nodnsavailableforthis.com
204.16.237.27	A	c.nodnsavailableforthis.com
204.16.237.28	A	d.nodnsavailableforthis.com
204.16.237.40	A+PTR	spam1.1800contacts.com
204.16.237.41	A+PTR	spam2.1800contacts.com
204.16.237.46	A+PTR	mx1.1800contacts.com
204.16.237.47	A+PTR	mx2.1800contacts.com
204.16.237.61	A	zixgateway02.1800contacts.com
204.16.239.20	A	services.1800contacts.com
204.16.239.25	A	smtp.1800contacts.com
204.16.239.25	A	mail.1800contacts.com
204.16.239.26	A	glasses.com
204.16.239.28	A+PTR	1800contactstest.com
204.16.239.31	A+PTR	3dfit.com
204.16.239.31	A+PTR	www.3dfit.com
204.16.239.31	A+PTR	fis.glassestest.com
204.16.239.36	A	lumenoptical.com
204.16.239.38	A	m.18c.info
204.16.239.39	A	contactlenslaw.com
204.16.239.40	A	vision101.com
204.16.239.41	A+PTR	osta.glassestest.com
204.16.239.41	PTR	osta.beta.glassestest.com
204.16.239.45	A	gson.glassestest.com
204.16.239.45	A	expressexam.com
204.16.239.47	A	services05.1800contactstest.com
204.16.239.48	A	services06.1800contactstest.com
204.16.239.58	A	oprddwl.1800contacts.com
204.16.239.59	A	kontakts.info
204.16.239.59	A	1800-reverse.org
204.16.239.59	A	www.lens1st.com
204.16.239.60	A	aquasoft.com
204.16.239.63	PTR	www.premiumvision.com
204.16.239.63	PTR	premiumvision.com
204.16.239.63	A	expressexam.1800contacts.com
204.16.239.66	A+PTR	premiumvisiontest.com
204.16.239.66	A+PTR	*.premiumvisiontest.com
204.16.239.67	A	www.premiumvision.com
204.16.239.67	A	premiumvision.com
204.16.239.72	A	eyedoctor.com
204.16.239.85	A	heimdall-1-pri.a.800svc.net
204.16.239.85	A	ecommerceapi-6-pri.a.800svc.net
204.16.239.93	A	southvalleyoptical.com
204.16.239.101	A	i.1800contacts.com