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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NPA: 906 [Rate centres in NPA 906] [Dial plan for NPA 906]

NXX:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA Eff date Disc date Map
906-337 A Calumet MI CALMMIMNRSA  9323 AMERITECH MICHIGAN 342     map
906-337 0 Calumet MI   9323 AMERITECH MICHIGAN 342      
906-337 1 Calumet MI   9323 AMERITECH MICHIGAN 342      
906-337 2 Calumet MI   9323 AMERITECH MICHIGAN 342      
906-337 3 Calumet MI   9323 AMERITECH MICHIGAN 342      
906-337 4 Calumet MI   9323 AMERITECH MICHIGAN 342      
906-337 5 Calumet MI   9323 AMERITECH MICHIGAN 342      
906-337 6 Calumet MI   9323 AMERITECH MICHIGAN 342      

Last updated: Sat, 14 Apr 2018 22:33:36 UTC

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