Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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McCook, TX

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
956-557 A HRLNTXHGXFX  508J CENTURYLINK COMMUNICATIONS, LLC 568      
956-557 5   145J TERRA NOVA TELECOM INC. 568   2025-08-15   
956-557 7 HRLNTXHGXFX  508J CENTURYLINK COMMUNICATIONS, LLC 568   2016-07-09   
956-842 A HRGLTXXARS0  2159 VALLEY TEL. COOP., INC. 568      

Last updated: Fri, 25 Jul 2025 03:21:23 UTC

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