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: 375

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-375 A Nogales AZ NGLSAZMWDS0  9636 QWEST CORPORATION 668      
520-375 0 Nogales AZ   9636 QWEST CORPORATION 668      
520-375 1 Nogales AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 668   2021-12-16   
520-375 2 Nogales AZ   630E ONVOY, LLC - AZ 668   2019-12-09   
520-375 3 Nogales AZ   630E ONVOY, LLC - AZ 668   2019-12-09   
520-375 4 Nogales AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 668   2025-02-10   
520-375 5 Nogales AZ   9636 QWEST CORPORATION 668      
520-375 6 Nogales AZ   9636 QWEST CORPORATION 668      
520-375 7 Nogales AZ   9636 QWEST CORPORATION 668      
520-375 8 Nogales AZ   9636 QWEST CORPORATION 668      
520-375 9 Nogales AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 668   2011-05-30   

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

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