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: SHOKCA022MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
747-221 0 Glendale CA 576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2013-08-22   
805-804 6 Ventura Central CA 576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2005-09-02   
818-405 1 La Crescenta CA 576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2013-08-22   
951-749 8 Mira Loma CA 576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2013-08-22   

Last updated: Tue, 16 Jun 2026 00:09:45 UTC

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