Local Calling Guide

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Dallas, TX

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
972-643 1   9533 SOUTHWESTERN BELL 552      
972-643 2   9533 SOUTHWESTERN BELL 552      
972-643 3   9533 SOUTHWESTERN BELL 552      
972-643 4   9533 SOUTHWESTERN BELL 552      
972-643 5   9533 SOUTHWESTERN BELL 552      
972-643 6   9533 SOUTHWESTERN BELL 552      
972-643 7   9533 SOUTHWESTERN BELL 552      
972-643 8   004F BANDWIDTH.COM CLEC, LLC - TX 552   2012-08-16   
972-643 9   9533 SOUTHWESTERN BELL 552      
972-644 A DLLSTXRNDS0  9533 SOUTHWESTERN BELL 552      
972-656 A DLLSTXJFDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552      
972-656 0   903C ONVOY, LLC - TX 552   2011-07-21   
972-656 1   903C ONVOY, LLC - TX 552   2011-07-21   
972-656 2   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552      
972-656 3   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552      
972-656 4   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2010-08-24   
972-656 5   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2010-08-24   
972-656 6   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2008-12-18   
972-656 7   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2008-12-18   
972-656 8   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2008-12-18   
972-656 9   004F BANDWIDTH.COM CLEC, LLC - TX 552   2012-08-16   
972-661 A DLLSTXADDS1  9533 SOUTHWESTERN BELL 552      
972-663 A DLLSTXADDS1  9533 SOUTHWESTERN BELL 552      
972-663 0   624H ONVOY SPECTRUM, LLC 552   2021-05-22   
972-663 1   9533 SOUTHWESTERN BELL 552      
972-663 2   9533 SOUTHWESTERN BELL 552      
972-663 3   9533 SOUTHWESTERN BELL 552      
972-663 4   9533 SOUTHWESTERN BELL 552      
972-663 5   903C ONVOY, LLC - TX 552   2011-08-03   
972-663 6   9533 SOUTHWESTERN BELL 552      
972-663 7   9533 SOUTHWESTERN BELL 552      
972-663 8   9533 SOUTHWESTERN BELL 552      
972-663 9   9533 SOUTHWESTERN BELL 552      
972-664 A DLLSTXRNDS0  9533 SOUTHWESTERN BELL 552      
972-664 0   9533 SOUTHWESTERN BELL 552      
972-664 1   9533 SOUTHWESTERN BELL 552      
972-664 2   9533 SOUTHWESTERN BELL 552      
972-664 3   9533 SOUTHWESTERN BELL 552      
972-664 4   004F BANDWIDTH.COM CLEC, LLC - TX 552   2010-10-28   
972-664 5   9533 SOUTHWESTERN BELL 552      
972-664 6   9533 SOUTHWESTERN BELL 552      
972-664 7   9533 SOUTHWESTERN BELL 552      
972-664 8   9533 SOUTHWESTERN BELL 552      
972-664 9   9533 SOUTHWESTERN BELL 552      
972-669 A DLLSTXRNDS0  9533 SOUTHWESTERN BELL 552      
972-671 A DLLSTXRNDS0  9533 SOUTHWESTERN BELL 552      
972-671 0   9533 SOUTHWESTERN BELL 552      
972-671 1   6529 T-MOBILE USA, INC. 552   2025-05-12   
972-671 2   9533 SOUTHWESTERN BELL 552      
972-671 3   624H ONVOY SPECTRUM, LLC 552   2021-12-19   

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

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