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: SKTNCASL4MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
209-929 A Stockton CA 732J NUSO, LLC 738      
209-929 7 Stockton CA 732J NUSO, LLC 738   2023-02-18   
350-217 6 Stockton CA 732J NUSO, LLC 738   2024-04-06   
350-217 7 Stockton CA 732J NUSO, LLC 738   2024-04-06   
350-350 8 Stockton CA 732J NUSO, LLC 738   2024-07-12   
350-355 1 Stockton CA 732J NUSO, LLC 738   2024-07-12   

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

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