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: 394

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-394 A Nogales AZ PTGNAZMARS1  9636 QWEST CORPORATION 668      
520-394 0 Nogales AZ   9636 QWEST CORPORATION 668      
520-394 1 Nogales AZ   515J IP HORIZON LLC 668   2021-10-01   
520-394 2 Nogales AZ   9636 QWEST CORPORATION 668      
520-394 3 Nogales AZ   829J PAETEC ITEL, LLC 668   2026-01-17   
520-394 4 Nogales AZ   3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 668   2006-09-14   
520-394 5 Nogales AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 668   2012-08-17   
520-394 6 Nogales AZ   3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 668   2013-01-11   
520-394 7 Nogales AZ   630E ONVOY, LLC - AZ 668   2007-05-26   
520-394 8 Nogales AZ   630E ONVOY, LLC - AZ 668   2012-05-22   
520-394 9 Nogales AZ   9636 QWEST CORPORATION 668      

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

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