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: GNBONCCKW30

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
336-303 A Greensboro NC 4809 CENTURYLINK COMMUNICATIONS LLC - NC 424      
336-306 A Winston-Salem NC 4809 CENTURYLINK COMMUNICATIONS LLC - NC 424      
336-307 A High Point NC 4809 CENTURYLINK COMMUNICATIONS LLC - NC 424      
336-308 A Asheboro NC 4809 CENTURYLINK COMMUNICATIONS LLC - NC 424      
336-309 A Lexington NC 4809 CENTURYLINK COMMUNICATIONS LLC - NC 424      
336-310 A Kernersville NC 4809 CENTURYLINK COMMUNICATIONS LLC - NC 424      
336-313 A Thomasville NC 4809 CENTURYLINK COMMUNICATIONS LLC - NC 424      

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

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