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: LSANCARCY5X

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
213-465 A Los Angeles: DA 07 CA 515J IP HORIZON LLC 730      
213-546 A Los Angeles: DA 06 CA 515J IP HORIZON LLC 730      
213-546 1 Los Angeles: DA 06 CA 515J IP HORIZON LLC 730   2021-01-16   
213-550 A Los Angeles: DA 01 CA 515J IP HORIZON LLC 730      
213-769 A Los Angeles: DA 10 CA 515J IP HORIZON LLC 730      
310-409 A Beverly Hills CA 515J IP HORIZON LLC 730      
310-906 A El Segundo CA 515J IP HORIZON LLC 730      
310-929 A Avalon CA 515J IP HORIZON LLC 730      
323-393 A Los Angeles: DA 09 CA 515J IP HORIZON LLC 730      
323-503 A Los Angeles: DA 02 CA 515J IP HORIZON LLC 730      
323-704 A Los Angeles: DA 05 CA 515J IP HORIZON LLC 730      
323-743 A Los Angeles: DA 06 CA 515J IP HORIZON LLC 730      
323-809 A Los Angeles: DA 14 CA 515J IP HORIZON LLC 730      
562-450 A Downey CA 515J IP HORIZON LLC 730      
562-457 A Whittier CA 515J IP HORIZON LLC 730      
626-200 A Pasadena: Pasadena DA CA 515J IP HORIZON LLC 730      
626-779 A San Gabriel Canyon CA 515J IP HORIZON LLC 730      
661-262 A Lake Hughes CA 515J IP HORIZON LLC 730      
661-468 A Palmdale: Agua Dulce DA CA 515J IP HORIZON LLC 730      
661-532 A Big Butte CA 515J IP HORIZON LLC 730      
661-673 A Santa Clarita: Saugus Canyon Country DA CA 515J IP HORIZON LLC 730      

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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