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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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
350-202 A Thornton CA 939H COMMIO, LLC 738      
350-202 0 Thornton CA 939H COMMIO, LLC 738   2022-12-31   
350-202 1 Thornton CA 939H COMMIO, LLC 738   2022-12-31   
350-202 2 Thornton CA 939H COMMIO, LLC 738   2022-12-31   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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