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.

OCN: 7262 XO CALIFORNIA, INC.

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
209-289 A Modesto CA SKTNCA01X8Z  738      
209-289 2 Modesto CA   738   2014-12-04   
323-301 A Los Angeles: DA 14 CA SNANCALWDS1  730      
323-301 4 Los Angeles: DA 14 CA   730      
323-305 A Los Angeles: DA 09 CA SNANCALWDS1  730      
323-305 0 Los Angeles: DA 09 CA   730      
323-305 7 Los Angeles: DA 09 CA   730      
408-786 A San Jose: North DA CA FRMTCAEDDS2  722      
408-786 0 San Jose: North DA CA   722   2005-07-23   
559-943 A Del Rey CA FRSNCA01XGZ  728      
559-943 2 Del Rey CA   728   2014-12-06   
760-615 A Pauma Valley CA SNDJCA05DS3  732      
760-615 1 Pauma Valley CA   732   2006-05-25   
760-615 7 Pauma Valley CA   732   2007-04-08   
909-288 0 Claremont-San Dimas CA   730   2011-01-17   
916-868 A Sacramento: Main DA CA RSVLCANLDS4  726      
916-868 0 Sacramento: Main DA CA   726      
925-290 A Livermore CA FRMTCAEDDS2  722      
925-290 0 Livermore CA   722      
925-290 1 Livermore CA   722   2005-01-25   

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

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