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: FRSNCA016MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
559-306 5 Porterville CA 7421 AT&T LOCAL 728   2007-11-10   
559-312 A Fresno CA 7421 AT&T LOCAL 728      
559-312 1 Fresno CA 7421 AT&T LOCAL 728      
559-312 2 Fresno CA 7421 AT&T LOCAL 728      
559-312 9 Fresno CA 7421 AT&T LOCAL 728      
559-366 5 Tulare CA 7421 AT&T LOCAL 728   2006-07-21   
559-416 4 Madera CA 7421 AT&T LOCAL 728   2008-04-26   
559-765 3 Clovis CA 7421 AT&T LOCAL 728   2004-06-14   
559-802 A Visalia CA 7421 AT&T LOCAL 728      
559-802 9 Visalia CA 7421 AT&T LOCAL 728      

Last updated: Tue, 04 May 2021 15:04:27 UTC

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