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: 759

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
657-759 A Brea CA ANHMCACLCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-09-20   
657-759 3 Brea CA   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-11-11   
657-759 4 Brea CA   6529 T-MOBILE USA, INC. 730   2024-09-27   
657-759 6 Brea CA   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-09-20   
657-759 7 Brea CA   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-09-20   
657-759 8 Brea CA   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-09-20   
657-759 9 Brea CA   6010 NEW CINGULAR WIRELESS PCS, LLC 730   2024-09-20   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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