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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: SKTNCA01XKZ

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
350-630 A Riverbank CA 624H ONVOY SPECTRUM, LLC 738   2024-01-19   
350-630 0 Riverbank CA 624H ONVOY SPECTRUM, LLC 738   2024-01-19   
350-666 1 San Andreas CA 624H ONVOY SPECTRUM, LLC 738   2023-12-15   
350-750 A Sonora: Main DA CA 624H ONVOY SPECTRUM, LLC 738   2024-01-19   
350-750 0 Sonora: Main DA CA 624H ONVOY SPECTRUM, LLC 738   2024-01-19   
350-777 8 Galt CA 624H ONVOY SPECTRUM, LLC 738   2023-12-11   
350-888 2 Groveland CA 624H ONVOY SPECTRUM, LLC 738   2023-12-11   
350-900 A Tracy CA 624H ONVOY SPECTRUM, LLC 738   2024-01-19   
350-900 0 Tracy CA 624H ONVOY SPECTRUM, LLC 738   2024-01-19   
350-930 A Turlock CA 624H ONVOY SPECTRUM, LLC 738   2024-01-19   
350-930 0 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   
350-955 0 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   
350-960 0 Waterford: Main DA CA 624H ONVOY SPECTRUM, LLC 738   2024-01-19   
350-999 1 Gustine CA 624H ONVOY SPECTRUM, LLC 738   2023-12-11   
559-715 7 Chowchilla CA 624H ONVOY SPECTRUM, LLC 738   2024-01-08   

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Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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