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: PSDNCA12DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
323-684 A Los Angeles: DA 03 CA 9740 PACIFIC BELL 730      
626-296 A Pasadena: Pasadena DA CA 9740 PACIFIC BELL 730      
626-345 A Pasadena: Pasadena DA CA 9740 PACIFIC BELL 730      
626-381 A Pasadena: Pasadena DA CA 9740 PACIFIC BELL 730      
626-398 A Pasadena: Pasadena DA CA 9740 PACIFIC BELL 730      
626-791 A Pasadena: Pasadena DA CA 9740 PACIFIC BELL 730      
626-794 A Pasadena: Pasadena DA CA 9740 PACIFIC BELL 730      
626-797 A Pasadena: Pasadena DA CA 9740 PACIFIC BELL 730      
626-798 A Pasadena: Pasadena DA CA 9740 PACIFIC BELL 730      
626-808 A Pasadena: Pasadena DA CA 9740 PACIFIC BELL 730      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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