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
906-334 A Tapiola MI TPLAMIXIRS0  342      
906-338 A Alston MI ALTNMIXIRS0  342      
906-353 A Baraga MI BARGMIXJDS0  342      
906-524 A L'Anse MI LNSEMIXIRP0  342      

Last updated: Tue, 31 Dec 2019 02:37:20 UTC

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