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: MTPKCACG1MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
424-477 A San Pedro CA 776C CHARTER FIBERLINK CA-CCO, LLC - CA 730      
562-470 A Compton: Compton DA CA 776C CHARTER FIBERLINK CA-CCO, LLC - CA 730      
626-872 A Alhambra CA 776C CHARTER FIBERLINK CA-CCO, LLC - CA 730      
818-928 A Pasadena: La Cañada DA CA 776C CHARTER FIBERLINK CA-CCO, LLC - CA 730      

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

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