Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Tucson, AZ

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
520-999 4 TCSNAZXGDS0  7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668   2013-10-17   
520-999 5 TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668   2014-08-27   
520-999 6 TCSNAZMAXHX  630E ONVOY, LLC - AZ 668   2013-01-04   
520-999 7 TCSNAZMAXHX  630E ONVOY, LLC - AZ 668   2013-01-04   
520-999 8 TCSNAZMAXHX  630E ONVOY, LLC - AZ 668   2013-01-04   
520-999 9 TCSNAZMAXHX  630E ONVOY, LLC - AZ 668   2013-01-04   

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Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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