Robtex

Up: 66.182.144.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 66.182.152.0/22
Down right: 66.182.156.0/22

IP	Type	Hostname
66.182.152.22	PTR	cbrmail.cbr-inc.com
66.182.152.66	PTR	netserver.lusklaw.com
66.182.152.99	PTR	delta.bangersusa.com
66.182.152.211	A+PTR	mail.evanslawpc.com
66.182.153.3	PTR	ultraliner.com
66.182.153.4	PTR	extranet.ultraliner.com
66.182.153.5	PTR	register.ultraliner.com
66.182.153.163	PTR	carraway.com
66.182.154.2	PTR	velociraptor.cnhi.com
66.182.154.4	PTR	cnmail.cnhi.com
66.182.154.5	PTR	navision.cnhi.com
66.182.154.8	PTR	support.cnhi.com
66.182.156.22	PTR	cbrmail.cbr-inc.com
66.182.159.11	PTR	sk.s7.ans1.ns66.klczy.com
66.182.159.11	A	mx01.producecenter.net
66.182.159.42	PTR	sk.s7.ans1.ns66.klczy.com
66.182.159.64	PTR	sk.s7.ans1.ns66.klczy.com
66.182.159.73	PTR	sk.s7.ans1.ns66.klczy.com
66.182.159.80	PTR	sk.s7.ans1.ns66.klczy.com
66.182.159.81	PTR	sk.s7.ans1.ns66.klczy.com
66.182.159.88	PTR	sk.s7.ans1.ns66.klczy.com
66.182.159.162	PTR	sk.s7.ans1.ns66.klczy.com
66.182.159.179	PTR	sk.s7.ans1.ns66.klczy.com
66.182.159.185	PTR	sk.s7.ans1.ns66.klczy.com
66.182.159.202	PTR	sk.s7.ans1.ns66.klczy.com
66.182.159.208	PTR	sk.s7.ans1.ns66.klczy.com
66.182.159.217	PTR	sk.s7.ans1.ns66.klczy.com
66.182.159.224	PTR	sk.s7.ans1.ns66.klczy.com