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: NWRKNJMDX4X

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
551-201 6 Jersey City NJ 732J NUSO, LLC 224   2024-07-23   
551-201 7 Jersey City NJ 732J NUSO, LLC 224   2024-07-07   
551-307 3 Jersey City NJ 732J NUSO, LLC 224   2024-08-19   
551-371 A Jersey City NJ 732J NUSO, LLC 224      
551-371 1 Jersey City NJ 732J NUSO, LLC 224   2023-04-02   

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

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