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.
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Switch: CHYNOKXADS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
580-457 A Canute OK 390B DOBSON TECHNOLOGIES-TRANSPORT & TELECOM SOL - OK 536     2025-07-27 
580-500 A Clinton OK 390B DOBSON TECHNOLOGIES-TRANSPORT & TELECOM SOL - OK 536      

Last updated: Fri, 25 Jul 2025 03:21:23 UTC

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