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: FRSNCA12DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
559-251 A Fresno CA 9740 PACIFIC BELL 728      
559-252 A Fresno CA 9740 PACIFIC BELL 728      
559-253 A Fresno CA 9740 PACIFIC BELL 728      
559-255 A Fresno CA 9740 PACIFIC BELL 728      
559-452 A Fresno CA 9740 PACIFIC BELL 728      
559-453 A Fresno CA 9740 PACIFIC BELL 728      
559-454 A Fresno CA 9740 PACIFIC BELL 728      
559-455 A Fresno CA 9740 PACIFIC BELL 728      
559-456 A Fresno CA 9740 PACIFIC BELL 728      
559-458 A Fresno CA 9740 PACIFIC BELL 728      
559-600 A Fresno CA 9740 PACIFIC BELL 728      

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

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