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: 397

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
956-397 A El Sauz TX HRLNTXHGXFX  508J CENTURYLINK COMMUNICATIONS, LLC 568      
956-397 7 El Sauz TX HRLNTXHGXFX  508J CENTURYLINK COMMUNICATIONS, LLC 568   2016-07-09   
956-397 8 El Sauz TX   5562 METROPCS, INC. 568   2026-06-18   
956-397 9 El Sauz TX   4290 STPCS JOINT VENTURE, LLC 568   2026-07-09   

Last updated: Fri, 10 Jul 2026 02:55:48 UTC

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