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: LSANCA56DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
323-254 A Los Angeles: DA 03 CA 9740 PACIFIC BELL 730      
323-255 A Los Angeles: DA 03 CA 9740 PACIFIC BELL 730      
323-256 A Los Angeles: DA 03 CA 9740 PACIFIC BELL 730      
323-257 A Los Angeles: DA 03 CA 9740 PACIFIC BELL 730      
323-258 A Los Angeles: DA 03 CA 9740 PACIFIC BELL 730      
323-259 A Los Angeles: DA 03 CA 9740 PACIFIC BELL 730      
323-340 A Los Angeles: DA 03 CA 9740 PACIFIC BELL 730      
323-341 A Los Angeles: DA 03 CA 9740 PACIFIC BELL 730      
323-344 A Los Angeles: DA 03 CA 9740 PACIFIC BELL 730      
323-349 A Los Angeles: DA 03 CA 9740 PACIFIC BELL 730      
323-384 A Los Angeles: DA 03 CA 9740 PACIFIC BELL 730      
323-478 A Los Angeles: DA 03 CA 9740 PACIFIC BELL 730      
323-550 A Los Angeles: DA 03 CA 9740 PACIFIC BELL 730      
323-551 A Los Angeles: DA 03 CA 9740 PACIFIC BELL 730      
323-982 A Los Angeles: DA 03 CA 9740 PACIFIC BELL 730      

Last updated: Fri, 01 Jul 2022 02:53:40 UTC

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