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: 457

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-457 A Tombstone AZ TMBSAZMARS1  9636 QWEST CORPORATION 668      
520-457 0 Tombstone AZ   630E ONVOY, LLC - AZ 668   2012-05-22   
520-457 1 Tombstone AZ   9636 QWEST CORPORATION 668      
520-457 2 Tombstone AZ   9636 QWEST CORPORATION 668      
520-457 3 Tombstone AZ   9636 QWEST CORPORATION 668      
520-457 4 Tombstone AZ   7217 TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 668   2012-07-12   
520-457 5 Tombstone AZ   630E ONVOY, LLC - AZ 668   2004-12-19   
520-457 6 Tombstone AZ   630E ONVOY, LLC - AZ 668   2017-06-22   
520-457 7 Tombstone AZ   630E ONVOY, LLC - AZ 668   2007-05-26   
520-457 8 Tombstone AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 668   2011-05-22   
520-457 9 Tombstone AZ   9636 QWEST CORPORATION 668      

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

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