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.

NPA: 559 [Rate centres in NPA 559] [Dial plan for NPA 559]

NXX: 455

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
559-455 A Fresno CA FRSNCA12DS0  9740 PACIFIC BELL 728      
559-455 0 Fresno CA FRSNCA12DS0  9740 PACIFIC BELL 728      
559-455 1 Fresno CA FRSNCA12DS0  9740 PACIFIC BELL 728      
559-455 2 Fresno CA FRSNCA12DS0  9740 PACIFIC BELL 728      
559-455 3 Fresno CA FRSOCAYM4MD  6529 T-MOBILE USA, INC. 728   2004-07-17   
559-455 4 Fresno CA FRSNCA12DS0  9740 PACIFIC BELL 728      
559-455 5 Fresno CA FRSNCA12DS0  9740 PACIFIC BELL 728      
559-455 6 Fresno CA FRSNCA12DS0  9740 PACIFIC BELL 728      
559-455 7 Fresno CA FRSOCAYM4MD  6529 T-MOBILE USA, INC. 728   2004-03-16   
559-455 8 Fresno CA FRSOCAYM4MD  6529 T-MOBILE USA, INC. 728   2004-08-08   
559-455 9 Fresno CA FRSNCA12DS0  9740 PACIFIC BELL 728      

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.