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: 444

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
956-444 A Harlingen TX HRLNTXHGDS0  9533 SOUTHWESTERN BELL 568      
956-444 0 Harlingen TX   9533 SOUTHWESTERN BELL 568      
956-444 1 Harlingen TX   9533 SOUTHWESTERN BELL 568      
956-444 2 Harlingen TX   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 568   2006-07-07   
956-444 3 Harlingen TX   9533 SOUTHWESTERN BELL 568      
956-444 4 Harlingen TX   965H FRACTEL, LLC 568   2020-07-12   
956-444 5 Harlingen TX   9533 SOUTHWESTERN BELL 568      
956-444 6 Harlingen TX   624H ONVOY SPECTRUM, LLC 568   2021-11-19   
956-444 7 Harlingen TX   9533 SOUTHWESTERN BELL 568      
956-444 8 Harlingen TX   624H ONVOY SPECTRUM, LLC 568   2021-11-19   
956-444 9 Harlingen TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 568   2022-12-08   

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

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