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: JCSNMSCP68Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
251-335 A Melvin AL 478J NUSO, LLC 482      
251-335 1 Melvin AL 478J NUSO, LLC 482   2020-11-08   
731-327 9 Michie TN 478J NUSO, LLC 482   2020-10-04   
769-245 A Jackson MS 478J NUSO, LLC 482      
769-245 1 Jackson MS 478J NUSO, LLC 482   2020-11-02   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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