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: 768

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
657-768 A Anaheim CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2024-11-15   
657-768 0 Anaheim CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2024-11-15   
657-768 1 Anaheim CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2024-11-15   
657-768 2 Anaheim CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2024-11-15   
657-768 3 Anaheim CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2024-11-15   
657-768 4 Anaheim CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2024-11-15   
657-768 5 Anaheim CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2024-11-15   
657-768 6 Anaheim CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2024-11-15   
657-768 7 Anaheim CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2024-11-15   
657-768 9 Anaheim CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2024-11-15   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.