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: 348

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-348 A Willcox AZ TCSNAZMAXYX  508J CENTURYLINK COMMUNICATIONS, LLC 668      
520-348 0 Willcox AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 668   2015-08-21   
520-348 1 Willcox AZ   579F PEERLESS NETWORK OF ARIZONA, LLC - AZ 668   2015-10-19   
520-348 2 Willcox AZ   630E ONVOY, LLC - AZ 668   2016-03-21   
520-348 3 Willcox AZ   630E ONVOY, LLC - AZ 668   2016-03-21   
520-348 4 Willcox AZ   630E ONVOY, LLC - AZ 668   2016-04-22   
520-348 5 Willcox AZ   630E ONVOY, LLC - AZ 668   2016-04-22   
520-348 6 Willcox AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 668   2018-06-08   
520-348 7 Willcox AZ   508J CENTURYLINK COMMUNICATIONS, LLC 668   2015-08-20   
520-348 8 Willcox AZ   073H TELNYX LLC 668   2018-05-01   
520-348 9 Willcox AZ   073H TELNYX LLC 668   2020-11-21   

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

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