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: 7534 FRONTIER CALIFORNIA INC.

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
213-740 A Los Angeles: DA 07 CA LSANCAIODS0  730      
213-764 A Los Angeles: DA 07 CA LSANCAIODS0  730      
213-796 3 Los Angeles: DA 04 CA   730   2024-04-07   
213-821 A Los Angeles: DA 07 CA LSANCAIODS0  730      
323-442 A Los Angeles: DA 04 CA LSANCAIKRS1  730      
323-442 0 Los Angeles: DA 04 CA   730   2001-09-27   
323-442 1 Los Angeles: DA 04 CA   730      
323-442 2 Los Angeles: DA 04 CA   730      
323-442 3 Los Angeles: DA 04 CA   730      
323-442 4 Los Angeles: DA 04 CA   730      
323-442 5 Los Angeles: DA 04 CA   730      
323-442 6 Los Angeles: DA 04 CA   730      
323-442 7 Los Angeles: DA 04 CA   730      
323-442 8 Los Angeles: DA 04 CA   730      
323-865 A Los Angeles: DA 04 CA LSANCAIKRS1  730      
323-865 1 Los Angeles: DA 04 CA   730   2001-09-27   
323-865 2 Los Angeles: DA 04 CA   730   2001-09-27   
323-865 6 Los Angeles: DA 04 CA   730   2001-09-27   
323-865 7 Los Angeles: DA 04 CA   730   2001-09-27   

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

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