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.

NPA: 843 [Rate centres in NPA 843] [Dial plan for NPA 843]

NXX: 377

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
843-377 A Charleston SC CHTNSCDTXSY  829J PAETEC ITEL, LLC 436   2025-02-18   
843-377 0 Charleston SC   829J PAETEC ITEL, LLC 436      
843-377 1 Charleston SC   829J PAETEC ITEL, LLC 436      
843-377 2 Charleston SC   829J PAETEC ITEL, LLC 436      
843-377 3 Charleston SC   8645 SUNCOM DBA T-MOBILE USA 436   2007-04-03   
843-377 4 Charleston SC   829J PAETEC ITEL, LLC 436      
843-377 5 Charleston SC   8645 SUNCOM DBA T-MOBILE USA 436   2007-01-03   
843-377 6 Charleston SC   8645 SUNCOM DBA T-MOBILE USA 436   2007-01-03   
843-377 7 Charleston SC   8645 SUNCOM DBA T-MOBILE USA 436   2007-02-15   
843-377 8 Charleston SC   712C BERKELEY CABLE TELEVISION INC DBA HOME TELECOM-SC 436   2006-10-21   
843-377 9 Charleston SC   8645 SUNCOM DBA T-MOBILE USA 436   2007-02-15   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.