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: NSVLTNMTYOZ

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
256-448 9 Francisco AL 478J NUSO, LLC 470   2020-09-28   
364-204 A Oak Grove KY 478J NUSO, LLC 470      
364-204 1 Oak Grove KY 478J NUSO, LLC 470   2020-10-27   
629-243 A Nashville TN 478J NUSO, LLC 470      
629-243 1 Nashville TN 478J NUSO, LLC 470   2020-10-17   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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