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: 326

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
657-326 A Garden Grove CA BLPKCAAFCM0  0051 SHELCOMM 730      

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

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