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: LSANCA10DS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
323-857 A Los Angeles: DA 13 CA 9740 PACIFIC BELL 730      
323-900 A Los Angeles: DA 13 CA 9740 PACIFIC BELL 730      
323-930 A Los Angeles: DA 13 CA 9740 PACIFIC BELL 730      
323-931 A Los Angeles: DA 13 CA 9740 PACIFIC BELL 730      
323-932 A Los Angeles: DA 13 CA 9740 PACIFIC BELL 730      
323-933 A Los Angeles: DA 13 CA 9740 PACIFIC BELL 730      
323-934 A Los Angeles: DA 13 CA 9740 PACIFIC BELL 730      
323-935 A Los Angeles: DA 13 CA 9740 PACIFIC BELL 730      
323-936 A Los Angeles: DA 13 CA 9740 PACIFIC BELL 730      
323-937 A Los Angeles: DA 13 CA 9740 PACIFIC BELL 730      
323-938 A Los Angeles: DA 13 CA 9740 PACIFIC BELL 730      
323-939 A Los Angeles: DA 13 CA 9740 PACIFIC BELL 730      
323-964 A Los Angeles: DA 13 CA 9740 PACIFIC BELL 730      

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

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