Robtex

Up: 166.132.0.0/15
Can't show all results, try to descend to a more specific CIDR
Down left: 166.133.0.0/17
Down right: 166.133.128.0/17

IP	Type	Hostname
166.133.0.61	PTR	mobile-166-133-000-061.mycingular.net
166.133.2.2	PTR	mobile-166-133-002-002.mycingular.net
166.133.3.2	PTR	mobile-166-133-003-002.mycingular.net
166.133.16.2	PTR	mobile-166-133-016-002.mycingular.net
166.133.29.2	PTR	mobile-166-133-029-002.mycingular.net
166.133.32.2	PTR	mobile-166-133-032-002.mycingular.net
166.133.33.2	PTR	mobile-166-133-033-002.mycingular.net
166.133.47.3	PTR	mobile-166-133-047-003.mycingular.net
166.133.57.240	PTR	mobile-166-133-057-240.mycingular.net
166.133.81.0	PTR	mobile-166-133-081-000.mycingular.net
166.133.117.0	PTR	mobile-166-133-117-000.mycingular.net
166.133.122.1	PTR	mobile-166-133-122-001.mycingular.net
166.133.122.2	PTR	mobile-166-133-122-002.mycingular.net
166.133.144.0	PTR	mobile-166-133-144-000.mycingular.net
166.133.144.2	PTR	mobile-166-133-144-002.mycingular.net
166.133.152.40	PTR	mobile-166-133-152-040.mycingular.net
166.133.154.99	PTR	mobile-166-133-154-099.mycingular.net
166.133.183.132	PTR	mobile-166-133-183-132.mycingular.net
166.133.190.1	PTR	mobile-166-133-190-001.mycingular.net
166.133.217.65	PTR	mobile-166-133-217-065.mycingular.net
166.133.219.0	PTR	mobile-166-133-219-000.mycingular.net
166.133.219.1	PTR	mobile-166-133-219-001.mycingular.net
166.133.219.2	PTR	mobile-166-133-219-002.mycingular.net
166.133.219.3	PTR	mobile-166-133-219-003.mycingular.net
166.133.252.173	PTR	mobile-166-133-252-173.mycingular.net