Robtex

Up: 64.120.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 64.120.48.0/23
Down right: 64.120.50.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.120.48.68	PTR	64.120.48.68.ubiquityservers.com
64.120.50.35	PTR	64.120.50.35.rdns.ubiquityservers.com
64.120.50.37	PTR	64.120.50.37.rdns.ubiquityservers.com
64.120.50.37	A	84949.com
64.120.50.37	A	27kj.com
64.120.50.53	PTR	64.120.50.53.ubiquityservers.com
64.120.50.53	A	hgw43.com
64.120.50.65	PTR	client.strong-ub1.reliablehosting.com
64.120.50.130	PTR	64.120.50.130.ubiquityservers.com
64.120.50.130	A	dc03.endofday.com
64.120.50.134	PTR	64.120.50.134.ubiquityservers.com
64.120.50.149	PTR	64.120.50.149.ubiquityservers.com
64.120.50.175	PTR	64.120.50.175.ubiquityservers.com
64.120.50.209	PTR	64.120.50.209.ubiquityservers.com
64.120.50.252	PTR	64.120.50.252.ubiquityservers.com
64.120.51.2	PTR
64.120.51.60	PTR	aubreecity.info
64.120.51.104	PTR	aubreecity.info