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: TCSNAZMAVMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
520-223 A Nogales AZ 3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 668      
520-314 A Tucson AZ 3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 668   2011-04-02   
520-369 A Tucson AZ 3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 668   2011-11-19   
575-424 A Virden NM 5470 LEVEL 3 COMMUNICATIONS, LLC - NM 668   2012-04-29   
928-439 A Duncan AZ 3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 668   2012-04-29   

Last updated: Sat, 11 Jul 2020 20:37:26 UTC

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