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.

Los Angeles: DA 04, CA

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
323-990 7 LSANCARCD3S  649C ONVOY, LLC - CA 730   2019-03-24   
323-990 8 LSANCARCD3S  649C ONVOY, LLC - CA 730   2019-03-24   
323-990 9 LSANCAJW6MD  073H TELNYX LLC 730   2018-05-11   
738-999 A   252F WIDE VOICE, LLC - CA 730   2025-11-21   
738-999 0   252F WIDE VOICE, LLC - CA 730   2025-11-21   
738-999 4   252F WIDE VOICE, LLC - CA 730   2025-11-21   
738-999 5   252F WIDE VOICE, LLC - CA 730   2025-11-21   
738-999 7   252F WIDE VOICE, LLC - CA 730   2025-11-21   
738-999 8   252F WIDE VOICE, LLC - CA 730   2025-11-21   
738-999 9   252F WIDE VOICE, LLC - CA 730   2025-11-21   

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

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