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: GDRPMIBL56Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
231-296 5 Fremont MI 732J NUSO, LLC 348   2024-11-15   
616-367 A Grand Rapids MI 732J NUSO, LLC 348      
616-367 2 Grand Rapids MI 732J NUSO, LLC 348   2022-11-05   
616-376 1 Grand Rapids MI 732J NUSO, LLC 348   2024-01-02   
616-376 2 Grand Rapids MI 732J NUSO, LLC 348   2024-01-02   
616-407 5 Grand Rapids MI 732J NUSO, LLC 348   2024-06-14   
616-407 6 Grand Rapids MI 732J NUSO, LLC 348   2024-06-14   
616-407 8 Grand Rapids MI 732J NUSO, LLC 348   2024-09-09   
616-407 9 Grand Rapids MI 732J NUSO, LLC 348   2024-09-09   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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