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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NPA: 501 [Rate centres in NPA 501] [Dial plan for NPA 501]

NXX: 571

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
501-571 A Wye AR GNBRARXA3MD  348F ONVOY, LLC - AR 528      
501-571 0 Wye AR GNBRARXA3MD  348F ONVOY, LLC - AR 528   2023-08-12   
501-571 1 Wye AR GNBRARXA7MD  624H ONVOY SPECTRUM, LLC 528   2024-02-27   
501-571 5 Wye AR GNBRARXA3MD  348F ONVOY, LLC - AR 528   2023-03-16   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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