Robtex

Up: 66.80.80.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 66.80.88.0/22
Down right: 66.80.92.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.80.88.128	A	ip-66-80-88-128.iad.megapath.net
66.80.88.244	A	ip-66-80-88-244.iad.megapath.net
66.80.89.62	A	ip-66-80-89-62.iad.megapath.net
66.80.89.188	A	ip-66-80-89-188.iad.megapath.net
66.80.90.210	A	worldexechvac.com
66.80.91.43	PTR	mail.idayo.com
66.80.92.144	PTR	mail.sablalik.us
66.80.92.144	A	ns1.sablalik.us
66.80.92.217	A+PTR	ip-66-80-92-217.iad.megapath.net
66.80.92.239	A	ip-66-80-92-239.iad.megapath.net
66.80.93.35	PTR	ip-66-80-93-35.iad.megapath.net
66.80.93.35	A	login1.pfmhost.com
66.80.93.35	A	login.pfmhost.com
66.80.93.36	A	ip-66-80-93-36.iad.megapath.net
66.80.93.40	PTR	ip-66-80-93-40.iad.megapath.net
66.80.93.41	PTR	ip-66-80-93-41.iad.megapath.net
66.80.93.41	A	*.pfm.us
66.80.93.44	A	cdn-rr-new.pfmhost.com
66.80.93.44	A	www.pfmsys.com
66.80.93.164	A	ip-66-80-93-164.iad.megapath.net
66.80.93.168	A	mail.tgalimited.com
66.80.93.244	A	phldad.com
66.80.93.252	A	ip-66-80-93-252.iad.megapath.net
66.80.94.58	PTR	mail.arcoent.com
66.80.94.58	A	ip-66-80-94-58.iad.megapath.net
66.80.94.190	A	sbs2.nealrgross.com
66.80.94.194	A+PTR	ip-66-80-94-194.iad.megapath.net
66.80.94.194	A	inn.egads.net
66.80.94.210	PTR	ip-66-80-94-210.iad.megapath.net
66.80.94.210	A	mail.redhawksites.com
66.80.94.211	PTR	ip-66-80-94-211.iad.megapath.net
66.80.94.211	A	patriotismunfurled.com
66.80.94.211	A	photojourneyonline.com
66.80.95.50	PTR	ip-66-80-95-50.iad.megapath.net
66.80.95.50	A	public.chemgen.com
66.80.95.145	PTR	ip-66-80-95-145.iad.megapath.net