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.
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Switch: SKTNCA01XNY

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
209-354 5 Merced CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 738   2011-03-09   
209-407 6 Tracy CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 738   2012-10-09   
209-426 4 Lodi CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 738   2015-02-10   
209-670 8 Stockton CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 738   2011-09-12   
209-809 A Modesto CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 738      
209-809 2 Modesto CA 7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 738   2010-10-18   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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