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.
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Switch: RBRNCA11DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
858-385 A Rancho Bernardo CA 9740 PACIFIC BELL 732      
858-451 A Rancho Bernardo CA 9740 PACIFIC BELL 732      
858-485 A Rancho Bernardo CA 9740 PACIFIC BELL 732      
858-487 A Rancho Bernardo CA 9740 PACIFIC BELL 732      
858-521 A Rancho Bernardo CA 9740 PACIFIC BELL 732      
858-524 A Rancho Bernardo CA 9740 PACIFIC BELL 732      
858-592 A Rancho Bernardo CA 9740 PACIFIC BELL 732      
858-613 A Rancho Bernardo CA 9740 PACIFIC BELL 732      
858-618 A Rancho Bernardo CA 9740 PACIFIC BELL 732      
858-655 A Rancho Bernardo CA 9740 PACIFIC BELL 732      
858-672 A Rancho Penasquitos CA 9740 PACIFIC BELL 732      
858-673 A Rancho Bernardo CA 9740 PACIFIC BELL 732      
858-674 A Rancho Bernardo CA 9740 PACIFIC BELL 732      
858-675 A Rancho Bernardo CA 9740 PACIFIC BELL 732      
858-676 A Rancho Bernardo CA 9740 PACIFIC BELL 732      
858-924 A Rancho Bernardo CA 9740 PACIFIC BELL 732      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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