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: 556

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
657-556 A Cypress CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730      
657-556 0 Cypress CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2022-01-21   
657-556 1 Cypress CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2022-03-25   
657-556 2 Cypress CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2022-04-02   
657-556 3 Cypress CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2022-03-11   
657-556 4 Cypress CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730   2022-02-17   
657-556 5 Cypress CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730   2022-02-17   
657-556 6 Cypress CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730   2022-02-17   
657-556 7 Cypress CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2022-02-17   
657-556 8 Cypress CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2022-02-17   
657-556 9 Cypress CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730   2022-01-20   

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

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