Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Combine EMS, TX

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
972-476 A DLLSTXSEDS0  9533 SOUTHWESTERN BELL 552      
972-476 0 DLLSTX97DSS  177F PEERLESS NETWORK OF TEXAS, LLC - TX 552   2012-05-07   
972-476 1 DLLSTX97DSS  177F PEERLESS NETWORK OF TEXAS, LLC - TX 552   2012-05-07   
972-476 2 DLLSTXALDS4  903C ONVOY, LLC - TX 552   2016-04-07   
972-476 3 DLLSTX97DSS  177F PEERLESS NETWORK OF TEXAS, LLC - TX 552   2012-05-07   
972-476 4 DLLSTX97DSS  177F PEERLESS NETWORK OF TEXAS, LLC - TX 552   2012-05-07   
972-476 5 DLLSTX97DSS  177F PEERLESS NETWORK OF TEXAS, LLC - TX 552   2012-05-07   
972-476 6 DLLSTXSEDS0  9533 SOUTHWESTERN BELL 552      
972-476 7 DLLSTXALDS4  903C ONVOY, LLC - TX 552   2008-08-02   
972-476 8 DLLSTX97DSS  177F PEERLESS NETWORK OF TEXAS, LLC - TX 552   2012-05-07   
972-476 9 DLLSTX97DSS  177F PEERLESS NETWORK OF TEXAS, LLC - TX 552   2012-05-07   

Last updated: Tue, 16 Jun 2026 00:09:45 UTC

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