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.

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
989-864 0 Minden City MI SGNWMIFAZMD  344   2003-03-08   
989-896 A West Branch MI SGNWMIFAZMD  344      
989-912 1 Cass City MI SGNWMIFAZMD  344   2003-03-08   
989-967 7 Remus MI SGNWMIFAZMD  344   2003-03-08   
989-981 8 Hubbardston MI SGNWMIFAZMD  344   2003-03-08   
989-984 8 East Tawas MI SGNWMIFAZMD  344   2010-01-15   

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Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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