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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OCN: 9245 CYNERGYCOMM.NET, INC. - MI

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
231-333 3 Cheboygan MI   348   2005-04-06   
231-384 4 Kalkaska MI   348   2006-02-16   
231-459 1 Boyne City MI   348   2005-04-06   
231-758 3 Petoskey MI   348   2004-06-26   
231-769 4 Muskegon MI   348   2006-06-25   
231-846 2 Cadillac MI   348   2005-08-28   
231-887 3 Manistee MI   348   2005-08-28   
231-928 6 Fremont MI   348   2005-08-28   
231-944 A Traverse City MI PTSKMICSDS0  348      
231-944 1 Traverse City MI   348   2004-03-31   
248-469 A Southfield MI SFLDMIMNXMX  340      
248-469 1 Southfield MI   340   2006-07-14   
517-708 A Lansing MI LNNGMIMNXZY  346      
517-708 1 Lansing MI   346   2006-09-18   
586-248 A Richmond MI SFLDMIMNXMX  340      
586-248 7 Richmond MI   340   2006-07-14   
616-433 9 Rockford MI   348   2005-09-01   
989-278 4 Alpena MI   344   2006-06-25   
989-787 A West Branch MI WBRNMIMN4MD  344      
989-787 1 West Branch MI   344   2005-09-26   
989-946 7 Standish MI   344   2006-11-17   

Last updated: Sun, 04 Apr 2021 19:28:27 UTC

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