Local Calling Guide

Area code/prefix search

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NPA: 956 [Rate centres in NPA 956] [Dial plan for NPA 956]

NXX: 603

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
956-603 A Edinburg TX HRLNTXHGX7X  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 568      
956-603 0 Edinburg TX HRLNTXKX8MD  5562 METROPCS, INC. 568   2018-03-23   
956-603 1 Edinburg TX HRLNTXHGMMD  004F BANDWIDTH.COM CLEC, LLC - TX 568   2018-06-03   
956-603 2 Edinburg TX HRLNTXHGXYX  793K TWC IP ENABLED SERVICES, LLC 568   2016-07-28   
956-603 3 Edinburg TX HRLNTXHGXOX  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 568   2020-08-21   
956-603 4 Edinburg TX HRLNTXHGXKX  624H ONVOY SPECTRUM, LLC 568   2021-11-15   
956-603 5 Edinburg TX HRLNTXHGXOX  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 568   2020-08-21   
956-603 6 Edinburg TX HRLNTXHGXOX  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 568   2020-08-21   
956-603 7 Edinburg TX HRLNTXHGXOX  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 568   2020-09-25   
956-603 8 Edinburg TX HRLNTXHGXKX  624H ONVOY SPECTRUM, LLC 568   2021-11-15   
956-603 9 Edinburg TX HRLNTXHGX7X  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 568   2015-01-09   

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

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