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.

Switch: LNNGMIMNX3Y

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
517-544 A Jackson MI 2550 123.NET, LLC 346      
517-584 A Albion MI 2550 123.NET, LLC 346      
517-609 A Jonesville MI 2550 123.NET, LLC 346      
517-642 A Munith MI 2550 123.NET, LLC 346      
517-679 A Lansing MI 2550 123.NET, LLC 346      
517-732 A Portland MI 2550 123.NET, LLC 346      
517-762 A Dansville MI 2550 123.NET, LLC 346      
517-785 A Onondaga MI 2550 123.NET, LLC 346      
517-828 A Hillsdale MI 2550 123.NET, LLC 346      
517-873 A Charlotte MI 2550 123.NET, LLC 346      
517-992 A Williamston MI 2550 123.NET, LLC 346      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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