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: BKFDCA11X7X

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
661-840 A Bakersfield: Main DA CA 624H ONVOY SPECTRUM, LLC 734      
661-840 0 Bakersfield: Main DA CA 624H ONVOY SPECTRUM, LLC 734   2021-06-15   
661-922 7 Delano CA 624H ONVOY SPECTRUM, LLC 734   2021-12-08   
661-933 0 Bakersfield: North DA CA 624H ONVOY SPECTRUM, LLC 734   2021-12-08   
661-933 9 Bakersfield: North DA CA 624H ONVOY SPECTRUM, LLC 734   2022-03-21   
661-996 8 Bakersfield: Main DA CA 624H ONVOY SPECTRUM, LLC 734   2024-12-08   

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Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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