Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 737 [Rate centres in NPA 737] [Dial plan for NPA 737]

NXX: 333

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
737-333 A Austin TX AUSTTXGRDS3  319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 558      
737-333 0 Austin TX AUSWTXGX6MD  6529 T-MOBILE USA, INC. 558   2013-07-02   
737-333 1 Austin TX AUSWTXGX6MD  6529 T-MOBILE USA, INC. 558   2013-07-02   
737-333 2 Austin TX AUSWTXGX6MD  6529 T-MOBILE USA, INC. 558   2013-07-02   
737-333 3 Austin TX AUSTTXGRDS3  319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 558   2013-07-01   
737-333 4 Austin TX AUSWTXGX6MD  6529 T-MOBILE USA, INC. 558   2013-07-02   
737-333 5 Austin TX AUSWTXGX6MD  6529 T-MOBILE USA, INC. 558   2013-07-02   
737-333 6 Austin TX AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2014-07-13   
737-333 7 Austin TX AUSWTXGX6MD  6529 T-MOBILE USA, INC. 558   2013-07-02   
737-333 8 Austin TX AUSWTXGX6MD  6529 T-MOBILE USA, INC. 558   2013-07-02   
737-333 9 Austin TX AUSWTXGX6MD  6529 T-MOBILE USA, INC. 558   2013-07-02   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.