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: 570

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-570 A Tucson AZ TCSNAZCRDS0  9636 QWEST CORPORATION 668      
520-570 0 Tucson AZ   9636 QWEST CORPORATION 668      
520-570 1 Tucson AZ   9636 QWEST CORPORATION 668      
520-570 2 Tucson AZ   9636 QWEST CORPORATION 668      
520-570 3 Tucson AZ   9636 QWEST CORPORATION 668      
520-570 4 Tucson AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 668   2025-09-22   
520-570 5 Tucson AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 668   2025-09-22   
520-570 6 Tucson AZ   9636 QWEST CORPORATION 668      
520-570 7 Tucson AZ   9636 QWEST CORPORATION 668      
520-570 8 Tucson AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 668   2025-09-22   
520-570 9 Tucson AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 668   2025-09-22   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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