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: SKTNCA01XPY

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
209-900 6 Modesto CA 7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 738   2012-02-22   
209-912 6 Galt CA 7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 738   2009-08-13   
209-924 6 Ripon CA 7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 738   2015-12-10   
209-937 1 Stockton CA 7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 738   2023-07-03   
209-964 5 Ione CA 7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 738   2022-08-10   
209-990 5 Stockton CA 7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 738   2017-09-21   
350-206 A Turlock CA 7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 738      
350-206 2 Turlock CA 7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 738   2023-10-13   
350-206 3 Turlock CA 7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 738   2023-10-13   
350-206 4 Turlock CA 7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 738   2023-10-13   
350-206 6 Turlock CA 7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 738   2023-05-01   
350-888 6 Groveland CA 7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 738   2023-01-17   
559-663 6 Chowchilla CA 7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 738   2012-08-30   

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Last updated: Sat, 02 May 2026 12:20:53 UTC

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