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: LVCRNCXADS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
336-258 8 Elkin NC 035B PIEDMONT COMMUNICATIONS SERVICES, INC. - NC 424   2009-04-12   
336-356 A Dobson NC 035B PIEDMONT COMMUNICATIONS SERVICES, INC. - NC 424      
336-444 8 Pilot Mountain NC 035B PIEDMONT COMMUNICATIONS SERVICES, INC. - NC 424   2009-04-12   
336-571 8 Elkin NC 035B PIEDMONT COMMUNICATIONS SERVICES, INC. - NC 424   2022-03-07   
336-648 8 Mount Airy NC 035B PIEDMONT COMMUNICATIONS SERVICES, INC. - NC 424   2009-04-12   
743-272 1 King NC 035B PIEDMONT COMMUNICATIONS SERVICES, INC. - NC 424   2024-08-23   
743-330 3 Elkin NC 035B PIEDMONT COMMUNICATIONS SERVICES, INC. - NC 424   2022-03-07   

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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