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: 639

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-639 A Tucson AZ TCSNAZMAXYX  508J CENTURYLINK COMMUNICATIONS, LLC 668      
520-639 0 Tucson AZ   6529 T-MOBILE USA, INC. 668   2016-03-01   
520-639 1 Tucson AZ   6529 T-MOBILE USA, INC. 668   2016-03-01   
520-639 2 Tucson AZ   6529 T-MOBILE USA, INC. 668   2016-03-01   
520-639 3 Tucson AZ   6529 T-MOBILE USA, INC. 668   2016-03-01   
520-639 4 Tucson AZ   5562 METROPCS, INC. 668   2016-05-02   
520-639 5 Tucson AZ   6529 T-MOBILE USA, INC. 668   2016-04-04   
520-639 6 Tucson AZ   318J COMCAST IP PHONE, LLC 668   2016-03-01   
520-639 7 Tucson AZ   508J CENTURYLINK COMMUNICATIONS, LLC 668   2015-06-16   
520-639 8 Tucson AZ   318J COMCAST IP PHONE, LLC 668   2015-06-17   
520-639 9 Tucson AZ   630E ONVOY, LLC - AZ 668   2015-06-30   

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

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