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: 534

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-534 A Tucson AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668      
520-534 0 Tucson AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 668   2021-03-15   
520-534 1 Tucson AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 668   2021-03-15   
520-534 2 Tucson AZ   3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 668   2021-03-13   
520-534 3 Tucson AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 668   2021-03-15   
520-534 4 Tucson AZ   6529 T-MOBILE USA, INC. 668   2021-03-22   
520-534 5 Tucson AZ   6529 T-MOBILE USA, INC. 668   2021-03-22   
520-534 6 Tucson AZ   6529 T-MOBILE USA, INC. 668   2021-03-22   
520-534 7 Tucson AZ   6529 T-MOBILE USA, INC. 668   2021-03-22   
520-534 8 Tucson AZ   6529 T-MOBILE USA, INC. 668   2021-03-12   
520-534 9 Tucson AZ   6529 T-MOBILE USA, INC. 668   2021-03-12   

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

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