Robtex

Up: 72.64.32.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 72.64.32.0/21
Down right: 72.64.40.0/21

IP	Type	Hostname
72.64.32.129	PTR	pool-72-64-32-129.nrflva.east.verizon.net
72.64.32.130	PTR	pool-72-64-32-130.nrflva.east.verizon.net
72.64.32.194	PTR	pool-72-64-32-194.nrflva.east.verizon.net
72.64.33.21	A+PTR	pool-72-64-33-21.nrflva.east.verizon.net
72.64.33.253	A+PTR	pool-72-64-33-253.nrflva.east.verizon.net
72.64.34.105	A+PTR	pool-72-64-34-105.nrflva.east.verizon.net
72.64.35.2	PTR	pool-72-64-35-2.nrflva.east.verizon.net
72.64.35.39	A	pool-72-64-35-39.nrflva.east.verizon.net
72.64.35.115	PTR	pool-72-64-35-115.nrflva.east.verizon.net
72.64.35.162	PTR	pool-72-64-35-162.nrflva.fios.verizon.net
72.64.35.162	A	pool-72-64-35-162.nrflva.east.verizon.net
72.64.35.175	A	pool-72-64-35-175.nrflva.east.verizon.net
72.64.35.182	A	pool-72-64-35-182.nrflva.east.verizon.net
72.64.35.192	PTR	pool-72-64-35-192.nrflva.fios.verizon.net
72.64.35.224	PTR	pool-72-64-35-224.nrflva.east.verizon.net
72.64.35.225	PTR	pool-72-64-35-225.nrflva.east.verizon.net
72.64.36.8	A	pool-72-64-36-8.nrflva.east.verizon.net
72.64.36.65	PTR	pool-72-64-36-65.nrflva.east.verizon.net
72.64.36.82	PTR	pool-72-64-36-82.nrflva.east.verizon.net
72.64.36.97	PTR	pool-72-64-36-97.nrflva.east.verizon.net
72.64.36.158	A	pool-72-64-36-158.nrflva.east.verizon.net
72.64.36.193	PTR	pool-72-64-36-193.nrflva.east.verizon.net
72.64.36.225	PTR	pool-72-64-36-225.nrflva.east.verizon.net
72.64.36.241	PTR	pool-72-64-36-241.nrflva.east.verizon.net
72.64.37.58	A	pool-72-64-37-58.nrflva.east.verizon.net
72.64.38.81	PTR	pool-72-64-38-81.nrflva.east.verizon.net
72.64.38.161	PTR	pool-72-64-38-161.nrflva.east.verizon.net
72.64.38.193	PTR	pool-72-64-38-193.nrflva.east.verizon.net
72.64.38.195	PTR	pool-72-64-38-195.nrflva.east.verizon.net
72.64.39.64	A+PTR	pool-72-64-39-64.nrflva.east.verizon.net
72.64.40.44	A	pool-72-64-40-44.nrflva.east.verizon.net
72.64.40.60	A	pool-72-64-40-60.nrflva.east.verizon.net
72.64.44.114	A+PTR	pool-72-64-44-114.nrflva.east.verizon.net
72.64.44.114	A	w3af.net
72.64.46.3	PTR	pool-72-64-46-3.nrflva.east.verizon.net
72.64.46.38	A	pool-72-64-46-38.nrflva.east.verizon.net