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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Switch: TCSMAZSJAMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
520-202 A Tucson AZ 7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668      
520-351 A Tucson AZ 7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668      
520-382 A Tucson AZ 7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668      
520-495 A Tucson AZ 7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668      
520-545 A Tucson AZ 7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668      
520-547 A Tucson AZ 7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668      
520-618 A Tucson AZ 7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668      
520-694 A Tucson AZ 7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668      
520-777 A Tucson AZ 7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668      
520-895 A Sierra Vista AZ 7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668      
520-901 A Tucson AZ 7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668      

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

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