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: SKTNCAGSGT0

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
350-219 A Stockton CA 6010 NEW CINGULAR WIRELESS PCS, LLC 738   2024-05-18   
350-220 A Modesto CA 6010 NEW CINGULAR WIRELESS PCS, LLC 738   2024-05-18   
350-224 A Atwater CA 6010 NEW CINGULAR WIRELESS PCS, LLC 738   2024-07-20   
350-228 A Stockton CA 6010 NEW CINGULAR WIRELESS PCS, LLC 738   2024-09-27   
350-230 A Modesto CA 6010 NEW CINGULAR WIRELESS PCS, LLC 738   2024-10-21   
350-234 A Jackson CA 6010 NEW CINGULAR WIRELESS PCS, LLC 738   2024-12-13   
559-223 A Chowchilla CA 6010 NEW CINGULAR WIRELESS PCS, LLC 738      

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

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