Local Calling Guide

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

NXX: 428

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
972-428 A Carrollton TX DLLFTXFQDS1  7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-428 0 Carrollton TX   7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-428 1 Carrollton TX   7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-428 2 Carrollton TX   903C ONVOY, LLC - TX 552   2005-11-30   
972-428 3 Carrollton TX   903C ONVOY, LLC - TX 552   2005-11-30   
972-428 4 Carrollton TX   7726 SOUTHWESTERN BELL TELEPHONE COMPANY - TX 552   2009-10-19   
972-428 5 Carrollton TX   7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-428 6 Carrollton TX   7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-428 7 Carrollton TX   903C ONVOY, LLC - TX 552   2008-08-29   
972-428 8 Carrollton TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 552   2025-01-26   
972-428 9 Carrollton TX   145J TERRA NOVA TELECOM INC. 552   2024-12-03   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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