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: TCSNAZMAXBY

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
520-537 A Tucson AZ 515J IP HORIZON LLC 668      
520-563 A Benson AZ 515J IP HORIZON LLC 668      
520-564 A Douglas AZ 515J IP HORIZON LLC 668      
520-567 A Hayden AZ 515J IP HORIZON LLC 668      
520-569 A San Manuel AZ 515J IP HORIZON LLC 668      
520-581 A Tombstone AZ 515J IP HORIZON LLC 668      

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

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