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: TCSMAZEEDS2

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
520-342 1 Tucson AZ 7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668   2007-08-24   
520-342 2 Tucson AZ 7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668   2007-08-24   
520-342 3 Tucson AZ 7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668   2007-08-24   
520-396 2 Tucson AZ 7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668   2006-11-26   
520-777 A Tucson AZ 7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668      
520-777 2 Tucson AZ 7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668   2004-12-18   

Last updated: Wed, 01 Dec 2021 01:40:16 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.