Local Calling Guide

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Dallas, TX

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
972-432 9   9533 SOUTHWESTERN BELL 552      
972-437 A DLLSTXRNDS0  9533 SOUTHWESTERN BELL 552      
972-437 0   9533 SOUTHWESTERN BELL 552      
972-437 1   9533 SOUTHWESTERN BELL 552      
972-437 2   9533 SOUTHWESTERN BELL 552      
972-437 3   9533 SOUTHWESTERN BELL 552      
972-437 4   9533 SOUTHWESTERN BELL 552      
972-437 5   9533 SOUTHWESTERN BELL 552      
972-437 6   9533 SOUTHWESTERN BELL 552      
972-437 7   9533 SOUTHWESTERN BELL 552      
972-437 8   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2007-11-07   
972-437 9   9533 SOUTHWESTERN BELL 552      
972-443 A DLLSTXNODS0  9533 SOUTHWESTERN BELL 552      
972-444 A DLLSTXNODS0  9533 SOUTHWESTERN BELL 552      
972-447 A DLLSTXREDS0  9533 SOUTHWESTERN BELL 552      
972-447 0   9533 SOUTHWESTERN BELL 552      
972-447 1   9533 SOUTHWESTERN BELL 552      
972-447 2   9533 SOUTHWESTERN BELL 552      
972-447 3   9533 SOUTHWESTERN BELL 552      
972-447 4   9533 SOUTHWESTERN BELL 552      
972-447 5   9533 SOUTHWESTERN BELL 552      
972-447 6   9533 SOUTHWESTERN BELL 552      
972-447 7   624H ONVOY SPECTRUM, LLC 552   2021-12-19   
972-447 8   9533 SOUTHWESTERN BELL 552      
972-447 9   9533 SOUTHWESTERN BELL 552      
972-448 A DLLSTXADDS0  9533 SOUTHWESTERN BELL 552      
972-450 A DLLSTXADDS0  9533 SOUTHWESTERN BELL 552      
972-454 A RCSNTXBZRS0  9533 SOUTHWESTERN BELL 552      
972-454 0   004F BANDWIDTH.COM CLEC, LLC - TX 552   2010-03-07   
972-454 1   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2011-06-08   
972-454 2   9533 SOUTHWESTERN BELL 552      
972-454 3   9533 SOUTHWESTERN BELL 552      
972-454 4   004F BANDWIDTH.COM CLEC, LLC - TX 552   2018-04-07   
972-454 5   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2011-06-08   
972-454 6   9533 SOUTHWESTERN BELL 552      
972-454 7   9533 SOUTHWESTERN BELL 552      
972-454 8   9533 SOUTHWESTERN BELL 552      
972-454 9   004F BANDWIDTH.COM CLEC, LLC - TX 552   2010-03-07   
972-455 A DLLSTXADDS1  9533 SOUTHWESTERN BELL 552      
972-455 0   9533 SOUTHWESTERN BELL 552      
972-455 1   9533 SOUTHWESTERN BELL 552      
972-455 2   9533 SOUTHWESTERN BELL 552      
972-455 3   9533 SOUTHWESTERN BELL 552      
972-455 4   9533 SOUTHWESTERN BELL 552      
972-455 5   9533 SOUTHWESTERN BELL 552      
972-455 6   9533 SOUTHWESTERN BELL 552      
972-455 7   9533 SOUTHWESTERN BELL 552      
972-455 8   903C ONVOY, LLC - TX 552   2012-02-22   
972-455 9   9533 SOUTHWESTERN BELL 552      
972-458 A DLLSTXADDS0  9533 SOUTHWESTERN BELL 552      

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

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