Robtex

Up: 64.81.120.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 64.81.120.0/23
Down right: 64.81.122.0/23

IP	Type	Hostname
64.81.120.0	PTR	dsl081-120-000.dfw1.dsl.speakeasy.net
64.81.120.6	A	exchange.billprotexas.com
64.81.120.83	A	mail.intelligrow.com
64.81.120.149	PTR	ns1.zenology.net
64.81.120.181	A	intelligrow.net
64.81.120.222	A	dsl081-120-222.dfw1.dsl.speakeasy.net
64.81.121.3	A+PTR	dsl081-121-003.dfw1.dsl.speakeasy.net
64.81.121.11	A+PTR	dsl081-121-011.dfw1.dsl.speakeasy.net
64.81.121.19	A+PTR	dsl081-121-019.dfw1.dsl.speakeasy.net
64.81.121.20	A+PTR	dsl081-121-020.dfw1.dsl.speakeasy.net
64.81.121.21	A+PTR	dsl081-121-021.dfw1.dsl.speakeasy.net
64.81.121.26	A+PTR	dsl081-121-026.dfw1.dsl.speakeasy.net
64.81.121.29	A+PTR	dsl081-121-029.dfw1.dsl.speakeasy.net
64.81.121.31	A+PTR	dsl081-121-031.dfw1.dsl.speakeasy.net
64.81.121.33	A+PTR	dsl081-121-033.dfw1.dsl.speakeasy.net
64.81.121.34	A+PTR	dsl081-121-034.dfw1.dsl.speakeasy.net
64.81.121.37	A+PTR	dsl081-121-037.dfw1.dsl.speakeasy.net
64.81.121.43	A+PTR	dsl081-121-043.dfw1.dsl.speakeasy.net
64.81.121.49	A+PTR	dsl081-121-049.dfw1.dsl.speakeasy.net
64.81.121.53	A+PTR	dsl081-121-053.dfw1.dsl.speakeasy.net
64.81.121.55	A+PTR	dsl081-121-055.dfw1.dsl.speakeasy.net
64.81.121.61	A+PTR	dsl081-121-061.dfw1.dsl.speakeasy.net
64.81.121.63	A+PTR	dsl081-121-063.dfw1.dsl.speakeasy.net
64.81.121.65	A+PTR	dsl081-121-065.dfw1.dsl.speakeasy.net
64.81.121.96	A+PTR	dsl081-121-096.dfw1.dsl.speakeasy.net
64.81.121.101	A	mail.professionalcaretakers.com
64.81.121.110	A+PTR	dsl081-121-110.dfw1.dsl.speakeasy.net
64.81.121.111	A+PTR	dsl081-121-111.dfw1.dsl.speakeasy.net
64.81.121.117	A+PTR	dsl081-121-117.dfw1.dsl.speakeasy.net
64.81.121.118	A+PTR	dsl081-121-118.dfw1.dsl.speakeasy.net
64.81.121.143	A+PTR	dsl081-121-143.dfw1.dsl.speakeasy.net
64.81.121.152	A+PTR	dsl081-121-152.dfw1.dsl.speakeasy.net
64.81.121.153	A+PTR	dsl081-121-153.dfw1.dsl.speakeasy.net
64.81.121.160	A+PTR	dsl081-121-160.dfw1.dsl.speakeasy.net
64.81.121.169	PTR	hecate.pbth.com
64.81.121.175	PTR	snideley.pbth.com
64.81.121.181	PTR	pbth.com
64.81.121.183	PTR	hh1.pbth.com
64.81.121.185	PTR	hh3.pbth.com
64.81.121.186	PTR	hh4.pbth.com
64.81.121.187	PTR	hh5.pbth.com
64.81.122.11	PTR	mail.bayarchitects.com
64.81.123.28	A	dsl081-123-028.dfw1.dsl.speakeasy.net
64.81.123.38	PTR	mail.tcresidential.com
64.81.123.98	PTR	mail.texasretina.com