Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 956 [Rate centres in NPA 956] [Dial plan for NPA 956]

NXX: 507

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
956-507 A Harlingen TX HRLNTXHGBMD  319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 568      
956-507 0 Harlingen TX   004F BANDWIDTH.COM CLEC, LLC - TX 568   2009-02-13   
956-507 1 Harlingen TX   004F BANDWIDTH.COM CLEC, LLC - TX 568   2024-09-16   
956-507 2 Harlingen TX   004F BANDWIDTH.COM CLEC, LLC - TX 568   2024-09-16   
956-507 3 Harlingen TX   490J DISH WIRELESS, LLC 568   2022-07-01   
956-507 4 Harlingen TX   319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 568   2005-05-27   
956-507 7 Harlingen TX   7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 568   2008-06-02   

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

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