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: 437

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-437 A Tucson AZ TCSNAZMAGT0  4793 XO ARIZONA, INC. 668      
520-437 0 Tucson AZ TCSNAZMAGT0  4793 XO ARIZONA, INC. 668   2006-05-21   
520-437 1 Tucson AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668   2007-03-09   
520-437 2 Tucson AZ TCSNAZXGAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 668   2006-06-26   
520-437 3 Tucson AZ TCSNAZXGAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 668   2006-06-26   
520-437 4 Tucson AZ TCSNAZXGAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 668   2006-06-26   
520-437 5 Tucson AZ TCSNAZXGAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 668   2006-06-26   
520-437 6 Tucson AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668   2006-07-06   
520-437 7 Tucson AZ TCSNAZXGAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 668   2006-07-22   
520-437 8 Tucson AZ TCSNAZXGAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 668   2006-07-22   
520-437 9 Tucson AZ TCSNAZXGAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 668   2006-07-13   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

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