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Dallas, TX

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
972-392 A DLLSTXADDS1  9533 SOUTHWESTERN BELL 552      
972-401 A DLLSTXNODS0  9533 SOUTHWESTERN BELL 552      
972-402 A DLLSTXNODS0  9533 SOUTHWESTERN BELL 552      
972-402 0   9533 SOUTHWESTERN BELL 552      
972-402 1   9533 SOUTHWESTERN BELL 552      
972-402 2   9533 SOUTHWESTERN BELL 552      
972-402 3   9533 SOUTHWESTERN BELL 552      
972-402 4   9533 SOUTHWESTERN BELL 552      
972-402 5   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2016-01-04   
972-402 6   903C ONVOY, LLC - TX 552   2016-02-15   
972-402 7   9533 SOUTHWESTERN BELL 552      
972-402 8   9533 SOUTHWESTERN BELL 552      
972-402 9   9533 SOUTHWESTERN BELL 552      
972-404 A DLLSTXADDS0  9533 SOUTHWESTERN BELL 552      
972-404 0   9533 SOUTHWESTERN BELL 552      
972-404 1   9533 SOUTHWESTERN BELL 552      
972-404 2   9533 SOUTHWESTERN BELL 552      
972-404 3   9533 SOUTHWESTERN BELL 552      
972-404 4   9533 SOUTHWESTERN BELL 552      
972-404 5   9533 SOUTHWESTERN BELL 552      
972-404 6   5562 METROPCS, INC. 552   2011-03-24   
972-404 7   9533 SOUTHWESTERN BELL 552      
972-404 8   9533 SOUTHWESTERN BELL 552      
972-404 9   9533 SOUTHWESTERN BELL 552      
972-405 A DLLSTXNODS0  9533 SOUTHWESTERN BELL 552      
972-406 A DLLSTXFBDS0  9533 SOUTHWESTERN BELL 552      
972-407 A DLLSTXREDS0  9533 SOUTHWESTERN BELL 552      
972-409 A DLLSTXNODS0  9533 SOUTHWESTERN BELL 552      
972-419 A DLLSTXADDS1  9533 SOUTHWESTERN BELL 552      
972-421 A DLLFTXFQDS1  7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-421 0   7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-421 1   7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-421 2   7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-421 3   7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-421 4   7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-421 5   7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-421 6   7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-421 7   7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-421 8   004F BANDWIDTH.COM CLEC, LLC - TX 552   2010-06-17   
972-421 9   7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-432 A DLLSTXNODS0  9533 SOUTHWESTERN BELL 552      
972-432 0   9533 SOUTHWESTERN BELL 552      
972-432 1   9533 SOUTHWESTERN BELL 552      
972-432 2   9533 SOUTHWESTERN BELL 552      
972-432 3   9533 SOUTHWESTERN BELL 552      
972-432 4   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2007-11-07   
972-432 5   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2007-11-07   
972-432 6   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2007-11-07   
972-432 7   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2007-11-07   
972-432 8   9533 SOUTHWESTERN BELL 552      

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

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