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: LSANCA03DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
310-437 2 Santa Monica: Mar Vista DA CA 7421 AT&T LOCAL 730   2002-08-21   
323-491 A Los Angeles: DA 14 CA 7421 AT&T LOCAL 730      
323-491 1 Los Angeles: DA 14 CA 7421 AT&T LOCAL 730      
323-491 2 Los Angeles: DA 14 CA 7421 AT&T LOCAL 730      
626-679 A Alhambra CA 7421 AT&T LOCAL 730      
626-679 9 Alhambra CA 7421 AT&T LOCAL 730      
714-451 3 Fullerton CA 7421 AT&T LOCAL 730   2002-02-25   
818-627 A Glendale CA 7421 AT&T LOCAL 730      
818-627 3 Glendale CA 7421 AT&T LOCAL 730      
818-627 4 Glendale CA 7421 AT&T LOCAL 730      
909-349 4 Fontana CA 7421 AT&T LOCAL 730   2002-02-26   

Last updated: Tue, 04 May 2021 15:04:27 UTC

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