Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
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Switch: SKTNCA01XKZ

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
209-616 A Stockton CA 624H ONVOY SPECTRUM, LLC 738      
209-868 A Stockton CA 624H ONVOY SPECTRUM, LLC 738      
209-921 A Stockton CA 624H ONVOY SPECTRUM, LLC 738      
350-208 A Knights Ferry CA 624H ONVOY SPECTRUM, LLC 738      
350-350 A Stockton CA 624H ONVOY SPECTRUM, LLC 738      
350-355 A Stockton CA 624H ONVOY SPECTRUM, LLC 738   2024-03-08   
350-500 A Atwater CA 624H ONVOY SPECTRUM, LLC 738   2024-01-15   
350-503 A Merced CA 624H ONVOY SPECTRUM, LLC 738   2024-01-15   
350-530 A Escalon CA 624H ONVOY SPECTRUM, LLC 738   2024-01-15   
350-550 A Moccasin CA 624H ONVOY SPECTRUM, LLC 738   2024-01-15   
350-600 A Oakdale CA 624H ONVOY SPECTRUM, LLC 738   2024-01-19   
350-630 A Riverbank CA 624H ONVOY SPECTRUM, LLC 738   2024-01-19   
350-750 A Sonora: Main DA CA 624H ONVOY SPECTRUM, LLC 738   2024-01-19   
350-900 A Tracy CA 624H ONVOY SPECTRUM, LLC 738   2024-01-19   
350-930 A Turlock CA 624H ONVOY SPECTRUM, LLC 738   2024-01-19   
350-955 A Waterford: Don Pedro DA CA 624H ONVOY SPECTRUM, LLC 738   2024-01-19   
350-960 A Waterford: Main DA CA 624H ONVOY SPECTRUM, LLC 738   2024-01-19   

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

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