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 OCN LATA LIR Eff date Disc date
517-924 A Coldwater MI 792K CHARTER IP ENABLED SERVICES, LLC 348      
517-924 0 Coldwater MI 792K CHARTER IP ENABLED SERVICES, LLC 348   2007-02-25   
517-924 1 Coldwater MI 792K CHARTER IP ENABLED SERVICES, LLC 348   2011-12-01   
616-384 3 Coopersville MI 792K CHARTER IP ENABLED SERVICES, LLC 348   2007-02-25   
616-899 1 Conklin MI 792K CHARTER IP ENABLED SERVICES, LLC 348   2014-10-19   

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Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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