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.
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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
520-203 A Tucson AZ 7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668      
520-284 A Tucson AZ 7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668      
520-669 A Sierra Vista AZ 7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668      
520-671 A Sierra Vista AZ 7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668      
520-672 A Sierra Vista AZ 7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668      
520-673 A Sierra Vista AZ 7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668      
520-674 A Sierra Vista AZ 7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668      
520-684 A Sierra Vista AZ 7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668      
520-687 A Sierra Vista AZ 7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668      
520-691 A Sierra Vista AZ 7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668      
520-692 A Sierra Vista AZ 7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668      
520-693 A Sierra Vista AZ 7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668      
520-706 A Sierra Vista AZ 7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668   2024-02-22   
520-707 A Sierra Vista AZ 7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668   2024-02-22   
520-708 A Sierra Vista AZ 7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668   2024-02-22   
520-713 A Sierra Vista AZ 7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668   2024-02-22   
520-714 A Sierra Vista AZ 7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668   2024-02-22   
520-715 A Sierra Vista AZ 7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668   2024-02-22   
520-716 A Sierra Vista AZ 7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668   2024-02-22   
520-717 A Sierra Vista AZ 7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668   2024-02-22   
520-718 A Sierra Vista AZ 7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668   2024-02-22   
520-725 A Sierra Vista AZ 7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668   2024-02-22   
520-917 A Tucson AZ 7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668      
520-918 A Tucson AZ 7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668      

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

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