Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 657 [Rate centres in NPA 657] [Dial plan for NPA 657]

NXX: 714

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
657-714 A Buena Park CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2024-08-03   
657-714 0 Buena Park CA   6529 T-MOBILE USA, INC. 730   2025-04-20   
657-714 3 Buena Park CA   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2025-06-14   
657-714 4 Buena Park CA ANHMCACLCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-11-11   
657-714 5 Buena Park CA   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2025-10-24   
657-714 7 Buena Park CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2024-08-03   
657-714 8 Buena Park CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2024-08-03   
657-714 9 Buena Park CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2024-08-03   

Last updated: Sat, 15 Nov 2025 03:38:44 UTC

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