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: TCSNAZMAXKX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
520-239 A Tucson AZ 7217 TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 668      
520-329 A Tucson AZ 7217 TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 668      
520-735 A Sierra Vista AZ 7217 TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 668   2024-05-27   
520-837 A Tucson AZ 7217 TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 668      
520-851 A Sierra Vista AZ 7217 TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 668   2024-12-06   
520-852 A Sierra Vista AZ 7217 TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 668   2024-12-06   
520-853 A Sierra Vista AZ 7217 TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 668   2024-12-06   
520-854 A Sierra Vista AZ 7217 TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 668   2024-12-06   
520-855 A Sierra Vista AZ 7217 TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 668   2024-12-06   
520-941 A Sierra Vista AZ 7217 TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 668   2024-01-03   
520-942 A Sierra Vista AZ 7217 TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 668   2024-01-03   
520-943 A Sierra Vista AZ 7217 TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 668   2024-01-03   
520-944 A Sierra Vista AZ 7217 TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 668   2024-01-03   
520-945 A Sierra Vista AZ 7217 TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 668   2024-01-03   
928-362 A Safford AZ 7217 TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 668      

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

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