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: 397

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-397 A Nogales AZ NGLSAZMARS1  9636 QWEST CORPORATION 668      
520-397 0 Nogales AZ NGLSAZMARS1  9636 QWEST CORPORATION 668      
520-397 1 Nogales AZ NGLSAZMARS1  9636 QWEST CORPORATION 668      
520-397 2 Nogales AZ NGLSAZMARS1  9636 QWEST CORPORATION 668      
520-397 3 Nogales AZ TCSNAZMAXHX  630E ONVOY, LLC - AZ 668   2020-03-30   
520-397 4 Nogales AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668   2007-10-15   
520-397 5 Nogales AZ NGLSAZMARS1  9636 QWEST CORPORATION 668      
520-397 6 Nogales AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 668   2025-02-10   
520-397 7 Nogales AZ NGLSAZMARS1  9636 QWEST CORPORATION 668      
520-397 8 Nogales AZ NGLSAZMARS1  9636 QWEST CORPORATION 668      
520-397 9 Nogales AZ NGLSAZMARS1  9636 QWEST CORPORATION 668      

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

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