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: 821 [Rate centres in NPA 821] [Dial plan for NPA 821]

NXX: 999

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
821-999 A Gaffney SC   548E ONVOY, LLC - SC 430   2025-03-13   
821-999 0 Gaffney SC   548E ONVOY, LLC - SC 430   2025-03-13   
821-999 9 Gaffney SC   548E ONVOY, LLC - SC 430   2025-03-13   

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

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