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: 657 [Rate centres in NPA 657] [Dial plan for NPA 657]

NXX: 678

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
657-678 A Anaheim CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730      
657-678 0 Anaheim CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2023-10-16   
657-678 1 Anaheim CA LSANCA03GMD  624H ONVOY SPECTRUM, LLC 730   2023-11-02   
657-678 2 Anaheim CA LSANCA03GMD  624H ONVOY SPECTRUM, LLC 730   2023-11-02   
657-678 3 Anaheim CA LSANCA03GMD  624H ONVOY SPECTRUM, LLC 730   2023-11-02   
657-678 4 Anaheim CA   6529 T-MOBILE USA, INC. 730   2024-03-21   
657-678 5 Anaheim CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2023-10-13   
657-678 6 Anaheim CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2023-10-13   
657-678 7 Anaheim CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2023-10-13   
657-678 8 Anaheim CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2023-10-13   
657-678 9 Anaheim CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2023-10-13   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.