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: SKTNCA01X6Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
209-263 A Lodi CA 516C AT&T CORP. 738      
209-317 A Coulterville CA 516C AT&T CORP. 738      
209-455 A Merced CA 516C AT&T CORP. 738      
209-651 A Sonora: Juno DA CA 516C AT&T CORP. 738      
209-813 A Angels Camp CA 516C AT&T CORP. 738      
209-910 A Stockton CA 516C AT&T CORP. 738      
350-232 A Pinecrest CA 516C AT&T CORP. 738   2025-01-15   

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

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