Robtex

Up: 66.71.216.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 66.71.220.0/23
Down right: 66.71.222.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.71.220.112	A	erimotiqrpurrm.com
66.71.221.42	PTR	221-42.usachoice.net
66.71.221.53	A+PTR	221-53.usachoice.net
66.71.222.2	PTR	ns.usainternet.net
66.71.222.2	A	ns1.fieldingproperties.net
66.71.222.2	A	ns1.blueandwhiteclub.com
66.71.222.4	A	222-4.usachoice.net
66.71.222.54	PTR	222-54.usachoice.net
66.71.222.100	A	222-100.usachoice.net
66.71.222.216	A	users.usachoice.net
66.71.222.217	PTR	222-217.usachoice.net
66.71.222.217	A	mikealaina.com
66.71.222.217	A	alainap.com
66.71.222.220	A+PTR	222-220.usachoice.net
66.71.222.220	A	casalumni.com
66.71.222.251	PTR	custhost1.usachoice.net
66.71.222.251	A	fscas.org
66.71.222.251	A	ns1.franklinpa.gov
66.71.223.2	PTR	ns2.usachoice.net
66.71.223.2	A	ns2.ptiprototype.com
66.71.223.2	A	ns2.casalumni.com