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: 643

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
956-643 A Brownsville TX MCALTX937MD  478J NUSO, LLC 568      
956-643 0 Brownsville TX   4290 STPCS JOINT VENTURE, LLC 568   2022-02-13   
956-643 1 Brownsville TX   4290 STPCS JOINT VENTURE, LLC 568   2022-02-13   
956-643 2 Brownsville TX   478J NUSO, LLC 568   2021-11-29   
956-643 3 Brownsville TX   903C ONVOY, LLC - TX 568   2022-03-11   
956-643 4 Brownsville TX   903C ONVOY, LLC - TX 568   2022-03-11   
956-643 5 Brownsville TX   4290 STPCS JOINT VENTURE, LLC 568   2022-02-13   
956-643 6 Brownsville TX   4290 STPCS JOINT VENTURE, LLC 568   2022-02-13   
956-643 7 Brownsville TX   4290 STPCS JOINT VENTURE, LLC 568   2022-02-13   
956-643 8 Brownsville TX   4290 STPCS JOINT VENTURE, LLC 568   2022-02-13   
956-643 9 Brownsville TX   4290 STPCS JOINT VENTURE, LLC 568   2022-02-13   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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