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: 820

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
657-820 A Anaheim CA   490J DISH WIRELESS, LLC 730   2025-08-20   
657-820 0 Anaheim CA   490J DISH WIRELESS, LLC 730   2025-08-20   
657-820 1 Anaheim CA   490J DISH WIRELESS, LLC 730   2025-08-20   
657-820 2 Anaheim CA   490J DISH WIRELESS, LLC 730   2025-08-20   
657-820 3 Anaheim CA   490J DISH WIRELESS, LLC 730   2025-10-20   
657-820 4 Anaheim CA   490J DISH WIRELESS, LLC 730   2025-10-20   
657-820 5 Anaheim CA   490J DISH WIRELESS, LLC 730   2025-12-19   

Last updated: Tue, 15 Jul 2025 18:46:49 UTC

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