Robtex

Up: 72.1.144.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 72.1.144.0/23
Down right: 72.1.146.0/23

IP	Type	Hostname
72.1.144.1	PTR	dsl001-144-001.phl1.dsl.speakeasy.net
72.1.144.2	PTR	dsl001-144-002.phl1.dsl.speakeasy.net
72.1.144.17	A+PTR	dsl001-144-017.phl1.dsl.speakeasy.net
72.1.144.53	A+PTR	dsl001-144-053.phl1.dsl.speakeasy.net
72.1.144.58	A+PTR	dsl001-144-058.phl1.dsl.speakeasy.net
72.1.144.71	PTR	dsl001-144-071.phl1.dsl.speakeasy.net
72.1.144.71	A	aspect-consulting.us
72.1.144.91	PTR	dsl001-144-091.phl1.dsl.speakeasy.net
72.1.144.99	PTR	dsl001-144-099.phl1.dsl.speakeasy.net
72.1.144.131	A	dsl001-144-131.phl1.dsl.speakeasy.net
72.1.144.206	A	dsl001-144-206.phl1.dsl.speakeasy.net
72.1.145.1	PTR	gw.princetontrans.com
72.1.145.12	A+PTR	dsl001-145-012.phl1.dsl.speakeasy.net
72.1.145.25	A+PTR	dsl001-145-025.phl1.dsl.speakeasy.net
72.1.145.29	A+PTR	dsl001-145-029.phl1.dsl.speakeasy.net
72.1.145.37	PTR	dsl001-145-037.phl1.dsl.speakeasy.net
72.1.145.39	PTR	tpfx.com
72.1.145.46	A+PTR	dsl001-145-046.phl1.dsl.speakeasy.net
72.1.145.50	A+PTR	dsl001-145-050.phl1.dsl.speakeasy.net
72.1.145.51	PTR	dsl001-145-051.phl1.dsl.speakeasy.net
72.1.145.54	PTR	dsl001-145-054.phl1.dsl.speakeasy.net
72.1.145.60	PTR	dsl001-145-060.phl1.dsl.speakeasy.net
72.1.145.63	PTR	dsl001-145-063.phl1.dsl.speakeasy.net
72.1.145.68	A+PTR	dsl001-145-068.phl1.dsl.speakeasy.net
72.1.145.88	PTR	dsl001-145-088.phl1.dsl.speakeasy.net
72.1.145.97	PTR	dsl001-145-097.phl1.dsl.speakeasy.net
72.1.145.98	PTR	dsl001-145-098.phl1.dsl.speakeasy.net
72.1.145.162	A	mail.tfscapital.com
72.1.145.220	A	dsl001-145-220.phl1.dsl.speakeasy.net
72.1.146.121	A	dsl001-146-121.bos1.dsl.speakeasy.net
72.1.147.34	A+PTR	dsl001-147-034.bos1.dsl.speakeasy.net
72.1.147.35	PTR	dsl001-147-035.bos1.dsl.speakeasy.net
72.1.147.40	A+PTR	dsl001-147-040.bos1.dsl.speakeasy.net