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: 291

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
956-291 A Harlingen TX HRLNTXHGDS0  9533 SOUTHWESTERN BELL 568      
956-291 0 Harlingen TX   004F BANDWIDTH.COM CLEC, LLC - TX 568   2017-08-12   
956-291 1 Harlingen TX   9533 SOUTHWESTERN BELL 568      
956-291 2 Harlingen TX   5562 METROPCS, INC. 568   2016-07-19   
956-291 3 Harlingen TX   004F BANDWIDTH.COM CLEC, LLC - TX 568   2017-08-12   
956-291 4 Harlingen TX   004F BANDWIDTH.COM CLEC, LLC - TX 568   2018-09-29   
956-291 5 Harlingen TX   9533 SOUTHWESTERN BELL 568      
956-291 6 Harlingen TX   7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 568   2017-04-13   
956-291 7 Harlingen TX   793K TWC IP ENABLED SERVICES, LLC 568   2016-04-18   
956-291 9 Harlingen TX   9533 SOUTHWESTERN BELL 568      

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

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