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: CHTNSCDTX6Y

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
843-531 A Charleston SC 548E ONVOY, LLC - SC 436      
843-666 A Charleston SC 548E ONVOY, LLC - SC 436      
843-790 A Charleston SC 548E ONVOY, LLC - SC 436      
843-793 A Charleston SC 548E ONVOY, LLC - SC 436      
843-806 A Charleston SC 548E ONVOY, LLC - SC 436      
843-888 A Mount Pleasant SC 548E ONVOY, LLC - SC 436      
854-220 A Summerville SC 548E ONVOY, LLC - SC 436      
854-254 A Walterboro SC 548E ONVOY, LLC - SC 436      
854-260 A Charleston SC 548E ONVOY, LLC - SC 436   2024-04-26   
854-273 A Summerville SC 548E ONVOY, LLC - SC 436   2024-06-08   
854-284 A Laurel Bay SC 548E ONVOY, LLC - SC 436   2025-02-06   
854-354 A Mount Pleasant SC 548E ONVOY, LLC - SC 436      
854-444 A Charleston SC 548E ONVOY, LLC - SC 436      
854-580 A Awendaw SC 548E ONVOY, LLC - SC 436   2024-01-31   
854-777 A Isle of Palms SC 548E ONVOY, LLC - SC 436      
854-800 A Charleston SC 548E ONVOY, LLC - SC 436      
854-858 A Mount Pleasant SC 548E ONVOY, LLC - SC 436      
854-888 A Summerville SC 548E ONVOY, LLC - SC 436      
854-999 A Charleston SC 548E ONVOY, LLC - SC 436      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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