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-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
406-972 A West Camp Crook MT BISNSDXADS0  640      
605-244 A Bison SD BISNSDXADS0  640      
605-257 A Nisland SD BISNSDXADS0  640      
605-374 A Lemmon SD BISNSDXADS0  640      
605-375 A Buffalo SD BISNSDXADS0  640      
605-456 A Newell SD BISNSDXADS0  640      
605-788 A Meadow SD BISNSDXADS0  640      
605-797 A Camp Crook SD BISNSDXADS0  640      
605-866 A Sorum SD BISNSDXADS0  640      
701-376 A North Lemmon ND BISNSDXADS0  640      

Last updated: Sat, 25 Feb 2023 02:10:49 UTC

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