Local Calling Guide

Area code/prefix search

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NPA: 972 [Rate centres in NPA 972] [Dial plan for NPA 972]

NXX: 999

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
972-999 A Irving TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552      
972-999 0 Irving TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552      
972-999 1 Irving TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552      
972-999 2 Irving TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552      
972-999 3 Irving TX   5562 METROPCS, INC. 552   2006-01-13   
972-999 4 Irving TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552      
972-999 5 Irving TX   5562 METROPCS, INC. 552   2005-09-29   
972-999 6 Irving TX   5562 METROPCS, INC. 552   2005-09-29   
972-999 7 Irving TX   5562 METROPCS, INC. 552   2005-09-29   
972-999 8 Irving TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552      
972-999 9 Irving TX   145J TERRA NOVA TELECOM INC. 552   2024-06-27   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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