Local Calling Guide

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Grand Prairie, TX

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
972-992 6 DLLATX37DS6  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552      
972-992 7 DLLATX37DS6  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552      
972-992 8 DLLTTXID1MD  6529 T-MOBILE USA, INC. 552   2004-07-05   
972-992 9 DLLSTXALDS4  903C ONVOY, LLC - TX 552   2024-07-05   

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Last updated: Wed, 04 Mar 2026 03:00:52 UTC

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