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: 223

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-223 A Nogales AZ TCSNAZMAVMD  3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 668      
520-223 0 Nogales AZ   6529 T-MOBILE USA, INC. 668   2003-08-27   
520-223 1 Nogales AZ   6529 T-MOBILE USA, INC. 668   2005-04-24   
520-223 2 Nogales AZ   6529 T-MOBILE USA, INC. 668   2005-06-20   
520-223 3 Nogales AZ   6529 T-MOBILE USA, INC. 668   2005-07-11   
520-223 4 Nogales AZ   3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 668      
520-223 5 Nogales AZ   6529 T-MOBILE USA, INC. 668   2005-10-08   
520-223 6 Nogales AZ   6529 T-MOBILE USA, INC. 668   2004-12-12   
520-223 7 Nogales AZ   6529 T-MOBILE USA, INC. 668   2005-02-04   
520-223 8 Nogales AZ   3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 668   2005-10-13   
520-223 9 Nogales AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 668   2010-01-01   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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