Local Calling Guide

Area code/prefix search

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NPA: 559 [Rate centres in NPA 559] [Dial plan for NPA 559]

NXX: 766

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
559-766 A Modesto CA SKTNCA0127T  9740 PACIFIC BELL 738      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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