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: CHTNSCDT21Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
843-402 A Charleston SC 073H TELNYX LLC 436      
843-402 8 Charleston SC 073H TELNYX LLC 436   2019-01-02   
854-766 0 Edisto Island SC 073H TELNYX LLC 436   2021-03-06   
854-858 0 Mount Pleasant SC 073H TELNYX LLC 436   2021-04-07   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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