Robtex

Up: 64.84.120.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 64.84.124.0/23
Down right: 64.84.126.0/23

IP	Type	Hostname
64.84.125.1	PTR	dsl-64-84-125-1.dsl3.crls.pa.net
64.84.125.8	PTR	dsl-64-84-125-8.dsl3.crls.pa.net
64.84.125.16	PTR	dsl-64-84-125-16.dsl3.crls.pa.net
64.84.125.18	PTR	dsl-64-84-125-18.dsl3.crls.pa.net
64.84.125.22	PTR	dsl-64-84-125-22.dsl3.crls.pa.net
64.84.125.24	PTR	dsl-64-84-125-24.dsl3.crls.pa.net
64.84.125.36	PTR	dsl-64-84-125-36.dsl3.crls.pa.net
64.84.125.44	PTR	dsl-64-84-125-44.dsl3.crls.pa.net
64.84.125.50	PTR	dsl-64-84-125-50.dsl3.crls.pa.net
64.84.125.51	PTR	dsl-64-84-125-51.dsl3.crls.pa.net
64.84.125.52	PTR	dsl-64-84-125-52.dsl3.crls.pa.net
64.84.125.57	PTR	dsl-64-84-125-57.dsl3.crls.pa.net
64.84.125.74	PTR	dsl-64-84-125-74.dsl3.crls.pa.net
64.84.125.90	PTR	dsl-64-84-125-90.dsl3.crls.pa.net
64.84.125.97	PTR	dsl-64-84-125-97.dsl3.crls.pa.net
64.84.125.103	PTR	dsl-64-84-125-103.dsl3.crls.pa.net
64.84.125.119	PTR	dsl-64-84-125-119.dsl3.crls.pa.net
64.84.125.126	PTR	dsl-64-84-125-126.dsl3.crls.pa.net
64.84.125.127	PTR	dsl-64-84-125-127.dsl3.crls.pa.net
64.84.125.151	PTR	dsl-64-84-125-151.dsl3.crls.pa.net
64.84.125.152	PTR	dsl-64-84-125-152.dsl3.crls.pa.net
64.84.125.164	PTR	dsl-64-84-125-164.dsl3.crls.pa.net
64.84.125.201	PTR	dsl-64-84-125-201.dsl3.crls.pa.net
64.84.125.229	PTR	dsl-64-84-125-229.dsl3.crls.pa.net
64.84.125.230	PTR	dsl-64-84-125-230.dsl3.crls.pa.net
64.84.125.231	PTR	dsl-64-84-125-231.dsl3.crls.pa.net
64.84.125.242	PTR	dsl-64-84-125-242.dsl3.crls.pa.net