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.


NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
209-800 A Stockton CA SKTNCA01XUY  738      
323-800 A Los Angeles: DA 05 CA LSANCARCDBS  730      
415-800 A San Francisco: Central DA CA SNFCCAMMDS9  722      
530-800 A Chico CA CHICCA01WMD  724      
559-800 A Fresno CA FRSNCA01XWY  728      
619-800 A San Diego: San Diego DA CA SNDGCA02DS2  732      
661-800 A Bakersfield: Main DA CA BKFDCA11PMD  734      
831-800 A Salinas CA SLNSCA01DS2  736      
858-800 A San Diego: Mira Mesa DA CA SNDGCA02DS2  732      
916-800 A Sacramento: Main DA CA SCRMCA01DS1  726      
916-900 A Sacramento: North DA CA SCRMCA01DS1  726      
916-900 9 Sacramento: North DA CA   726   2010-12-10   

Last updated: Mon, 24 May 2021 01:28:43 UTC

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