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: 600

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-600 A Tucson AZ TCSNAZMAXHX  630E ONVOY, LLC - AZ 668      
520-600 0 Tucson AZ   630E ONVOY, LLC - AZ 668   2017-12-08   
520-600 1 Tucson AZ   5562 METROPCS, INC. 668   2020-07-26   
520-600 2 Tucson AZ   3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 668   2019-08-31   
520-600 3 Tucson AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 668   2018-07-28   
520-600 4 Tucson AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 668   2018-07-28   
520-600 5 Tucson AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 668   2018-09-22   
520-600 6 Tucson AZ   630E ONVOY, LLC - AZ 668   2017-12-08   
520-600 7 Tucson AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 668   2018-10-26   
520-600 8 Tucson AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 668   2018-10-28   
520-600 9 Tucson AZ   5562 METROPCS, INC. 668   2018-10-05   

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

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