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: 738

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
956-738 A Rio Grande City TX HRLNTXHGX1X  903C ONVOY, LLC - TX 568      
956-738 0 Rio Grande City TX HRLNTXHGX1X  903C ONVOY, LLC - TX 568   2024-06-07   
956-738 1 Rio Grande City TX   4290 STPCS JOINT VENTURE, LLC 568   2026-01-29   
956-738 2 Rio Grande City TX HRLNTXHGX1X  903C ONVOY, LLC - TX 568   2023-10-23   
956-738 3 Rio Grande City TX HRLNTXHGX1X  903C ONVOY, LLC - TX 568   2024-03-03   
956-738 4 Rio Grande City TX HRLNTXHGX1X  903C ONVOY, LLC - TX 568   2024-03-03   
956-738 5 Rio Grande City TX   004F BANDWIDTH.COM CLEC, LLC - TX 568   2026-06-06   
956-738 7 Rio Grande City TX   4290 STPCS JOINT VENTURE, LLC 568   2025-03-10   
956-738 8 Rio Grande City TX   4290 STPCS JOINT VENTURE, LLC 568   2025-03-10   
956-738 9 Rio Grande City TX   4290 STPCS JOINT VENTURE, LLC 568   2025-03-10   

Last updated: Sun, 17 May 2026 03:26:51 UTC

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