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: 528

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-528 A Tucson AZ TCSNAZXGAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 668      
520-528 0 Tucson AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 668   2015-03-20   
520-528 1 Tucson AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 668   2015-04-06   
520-528 2 Tucson AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 668   2015-04-06   
520-528 3 Tucson AZ   6529 T-MOBILE USA, INC. 668   2015-12-23   
520-528 4 Tucson AZ   6529 T-MOBILE USA, INC. 668   2016-01-05   
520-528 5 Tucson AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 668   2015-05-26   
520-528 6 Tucson AZ   6529 T-MOBILE USA, INC. 668   2016-02-08   
520-528 7 Tucson AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 668   2015-06-25   
520-528 8 Tucson AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 668   2015-03-25   
520-528 9 Tucson AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 668   2015-03-25   

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

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