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: SNDGCA0268Z

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
858-296 A San Diego: Linda Vista DA CA 318J COMCAST IP PHONE, LLC 732      
858-299 A Del Mar CA 318J COMCAST IP PHONE, LLC 732      
858-302 A San Diego: Linda Vista DA CA 318J COMCAST IP PHONE, LLC 732      
858-303 A La Jolla CA 318J COMCAST IP PHONE, LLC 732      
858-312 A Rancho Bernardo CA 318J COMCAST IP PHONE, LLC 732      
858-345 A Del Mar CA 318J COMCAST IP PHONE, LLC 732      
858-371 A Rancho Penasquitos CA 318J COMCAST IP PHONE, LLC 732      
858-397 A San Diego: Mira Mesa DA CA 318J COMCAST IP PHONE, LLC 732      
858-634 A San Diego: Linda Vista DA CA 318J COMCAST IP PHONE, LLC 732      
858-768 A La Jolla CA 318J COMCAST IP PHONE, LLC 732      
858-832 A Rancho Santa Fe CA 318J COMCAST IP PHONE, LLC 732      
858-842 A Poway CA 318J COMCAST IP PHONE, LLC 732      

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Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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