Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 520 [Rate centres in NPA 520] [Dial plan for NPA 520]

NXX: 724

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-724 A Tucson AZ TCSNAZMADS1  9636 QWEST CORPORATION 668      
520-724 0 Tucson AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 668   2011-06-02   
520-724 1 Tucson AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 668   2011-06-02   
520-724 2 Tucson AZ   9636 QWEST CORPORATION 668   2011-06-01   
520-724 3 Tucson AZ   9636 QWEST CORPORATION 668   2011-06-01   
520-724 4 Tucson AZ   9636 QWEST CORPORATION 668   2011-06-01   
520-724 5 Tucson AZ   9636 QWEST CORPORATION 668   2011-06-01   
520-724 6 Tucson AZ   9636 QWEST CORPORATION 668   2011-06-01   
520-724 7 Tucson AZ   9636 QWEST CORPORATION 668   2011-06-01   
520-724 8 Tucson AZ   9636 QWEST CORPORATION 668   2011-06-01   
520-724 9 Tucson AZ   9636 QWEST CORPORATION 668   2011-10-07   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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