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: SKTNCA01XXZ

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
209-205 A Merced CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 738      
209-210 A Lodi CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 738      
209-216 A Turlock CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 738      
209-229 A Tracy CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 738      
209-232 A Modesto CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 738      
209-288 A Sonora: Main DA CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 738      
209-337 A Stockton CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 738      
209-338 A Modesto CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 738      
209-343 A Modesto CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 738      
209-348 A Clements CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 738      
209-373 A Stockton CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 738      
209-438 A Linden CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 738      
209-774 A Stockton CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 738      
209-820 A Tracy CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 738      
209-971 A Modesto CA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 738      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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