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: MPTNWIXARS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
920-355 A Mapleton WI 0886 FRONTIER NORTH INC. - WI 356      
920-355 0 Mapleton WI 0886 FRONTIER NORTH INC. - WI 356      
920-474 A Mapleton WI 0886 FRONTIER NORTH INC. - WI 356      
920-474 3 Mapleton WI 0886 FRONTIER NORTH INC. - WI 356      
920-474 4 Mapleton WI 0886 FRONTIER NORTH INC. - WI 356      
920-474 7 Mapleton WI 0886 FRONTIER NORTH INC. - WI 356      

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

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