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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OCN: 2338 SIERRA TEL. CO., INC.

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
209-742 A Mariposa CA MRPSCAXFRS0  728      
209-966 A Mariposa CA MRPSCAXFRS0  728      
559-641 A Coarsegold CA OKHRCAXADS0  728      
559-642 A Coarsegold CA OKHRCAXADS0  728      
559-658 A Coarsegold CA OKHRCAXADS0  728      
559-683 A Coarsegold CA OKHRCAXADS0  728      
559-689 A Raymond CA OKHRCAXADS0  728      
559-692 A Coarsegold CA OKHRCAXADS0  728      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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