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: 336 [Rate centres in NPA 336] [Dial plan for NPA 336]

NXX: 399

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
336-399 A Winston-Salem NC   8645 SUNCOM DBA T-MOBILE USA 424      
336-399 0 Winston-Salem NC GNBONCEU61Z  5562 METROPCS, INC. 424      
336-399 1 Winston-Salem NC GNBONCEU38Z  8645 SUNCOM DBA T-MOBILE USA 424      
336-399 2 Winston-Salem NC GNBONCEU38Z  8645 SUNCOM DBA T-MOBILE USA 424      
336-399 3 Winston-Salem NC GNBONCEU38Z  8645 SUNCOM DBA T-MOBILE USA 424      
336-399 4 Winston-Salem NC GNBONCEU38Z  8645 SUNCOM DBA T-MOBILE USA 424      
336-399 5 Winston-Salem NC GNBONCEU38Z  8645 SUNCOM DBA T-MOBILE USA 424      
336-399 6 Winston-Salem NC GNBONCEU38Z  8645 SUNCOM DBA T-MOBILE USA 424      
336-399 7 Winston-Salem NC GNBONCEU38Z  8645 SUNCOM DBA T-MOBILE USA 424      
336-399 8 Winston-Salem NC GNBONCEU38Z  8645 SUNCOM DBA T-MOBILE USA 424      
336-399 9 Winston-Salem NC GNBONCEU38Z  8645 SUNCOM DBA T-MOBILE USA 424      

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.