Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 350 [Rate centres in NPA 350] [Dial plan for NPA 350]

NXX: 237

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
350-237 A Patterson CA SKTNCA01XKZ  624H ONVOY SPECTRUM, LLC 738   2025-02-27   
350-237 0 Patterson CA SKTNCA01XKZ  624H ONVOY SPECTRUM, LLC 738   2025-02-27   
350-237 1 Patterson CA SKTNCA01XFY  649C ONVOY, LLC - CA 738   2025-05-27   
350-237 2 Patterson CA SKTNCAGSGT0  6010 NEW CINGULAR WIRELESS PCS, LLC 738   2025-10-31   
350-237 3 Patterson CA   649C ONVOY, LLC - CA 738   2026-08-01   
350-237 4 Patterson CA   649C ONVOY, LLC - CA 738   2026-08-01   
350-237 6 Patterson CA SKTNCA01XFY  649C ONVOY, LLC - CA 738   2026-04-05   
350-237 7 Patterson CA SKTNCA01XFY  649C ONVOY, LLC - CA 738   2026-04-05   
350-237 8 Patterson CA SKTNCA01XFY  649C ONVOY, LLC - CA 738   2025-10-26   
350-237 9 Patterson CA SKTNCA01XFY  649C ONVOY, LLC - CA 738   2025-10-26   

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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