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.

OCN: 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
209-343 A Modesto CA SKTNCA01XXZ  738      
209-343 1 Modesto CA   738      
209-343 2 Modesto CA   738      
209-343 3 Modesto CA   738      
209-343 4 Modesto CA   738      
209-343 5 Modesto CA   738      
209-343 6 Modesto CA   738      
209-343 7 Modesto CA   738      
209-343 8 Modesto CA   738      
209-343 9 Modesto CA   738      
209-348 A Clements CA SKTNCA01XXZ  738      
209-348 7 Clements CA   738   2007-02-02   
209-356 3 Atwater CA   738   2005-12-05   
209-364 2 Dos Palos CA   728   2005-12-05   
209-370 7 Lodi CA   738      
209-371 8 Lodi CA   738   2005-04-29   
209-373 A Stockton CA SKTNCA01XXZ  738      
209-373 1 Stockton CA   738   2005-04-30   
209-373 2 Stockton CA   738   2005-11-18   
209-373 4 Stockton CA   738      
209-386 1 Merced CA   738   2005-09-09   
209-398 5 Livingston CA   738   2013-08-03   
209-410 7 Turlock CA   738   2012-03-05   
209-417 3 Turlock CA   738   2009-11-22   
209-427 4 Turlock CA   738   2015-07-25   
209-436 5 Groveland CA   738   2005-12-05   
209-438 A Linden CA SKTNCA01XXZ  738      
209-438 3 Linden CA   738   2011-03-28   
209-452 4 Lodi CA   738   2015-07-24   
209-456 8 Manteca CA   738   2009-05-22   
209-507 7 Stockton CA   738   2008-11-15   
209-507 8 Stockton CA   738   2008-09-04   
209-546 3 Stockton CA   738   2013-05-23   
209-552 7 Modesto CA   738   2006-05-27   
209-566 7 Modesto CA   738   2008-11-15   
209-584 8 Valley Springs CA   738   2010-12-13   
209-624 5 Manteca CA   738   2005-07-22   
209-627 3 Tracy CA   738   2008-11-15   
209-636 5 Stockton CA   738   2015-07-25   
209-637 5 Tracy CA   738   2015-10-12   
209-647 6 Manteca CA   738   2012-01-12   
209-650 4 Tracy CA   738   2014-06-06   
209-661 8 Modesto CA   738   2011-08-27   
209-665 2 Manteca CA   738   2014-05-17   
209-674 6 San Andreas CA   738   2005-12-05   
209-676 6 Atwater CA   738   2005-06-02   
209-690 6 Crows Landing CA   738   2006-03-27   
209-691 7 Escalon CA   738   2005-04-25   
209-748 3 Herald CA   738   2017-09-15   
209-753 5 Angels Camp CA   738   2005-09-09   

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Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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