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Dallas, TX

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
972-860 2   9533 SOUTHWESTERN BELL 552      
972-860 3   9533 SOUTHWESTERN BELL 552      
972-860 4   9533 SOUTHWESTERN BELL 552      
972-860 5   9533 SOUTHWESTERN BELL 552      
972-860 6   9533 SOUTHWESTERN BELL 552      
972-860 7   9533 SOUTHWESTERN BELL 552      
972-860 8   9533 SOUTHWESTERN BELL 552      
972-860 9   903C ONVOY, LLC - TX 552   2009-02-11   
972-861 A DLLSTXEMDS0  9533 SOUTHWESTERN BELL 552      
972-861 0   004F BANDWIDTH.COM CLEC, LLC - TX 552   2010-12-30   
972-861 1   9533 SOUTHWESTERN BELL 552      
972-861 2   004F BANDWIDTH.COM CLEC, LLC - TX 552   2013-03-07   
972-861 3   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2010-02-16   
972-861 4   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2010-02-16   
972-861 5   903C ONVOY, LLC - TX 552   2010-01-21   
972-861 6   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2010-02-16   
972-861 7   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2010-02-16   
972-861 8   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2010-02-16   
972-861 9   6529 T-MOBILE USA, INC. 552   2025-06-19   
972-863 A DLLSTXEMDS0  9533 SOUTHWESTERN BELL 552      
972-863 0   004F BANDWIDTH.COM CLEC, LLC - TX 552   2010-12-30   
972-863 1   004F BANDWIDTH.COM CLEC, LLC - TX 552   2011-04-28   
972-863 2   004F BANDWIDTH.COM CLEC, LLC - TX 552   2011-04-28   
972-863 3   516C AT&T CORP. 552   2009-11-13   
972-863 4   9533 SOUTHWESTERN BELL 552   2009-06-07   
972-863 5   9533 SOUTHWESTERN BELL 552   2009-06-07   
972-863 6   9533 SOUTHWESTERN BELL 552      
972-863 7   516C AT&T CORP. 552   2009-06-25   
972-863 8   516C AT&T CORP. 552   2009-12-29   
972-863 9   516C AT&T CORP. 552   2009-12-29   
972-865 A FRSCTXBJPS0  7670 GRANDE COMMUNICATIONS NETWORKS, INC. - TX 552      
972-865 0   7670 GRANDE COMMUNICATIONS NETWORKS, INC. - TX 552      
972-865 1   7670 GRANDE COMMUNICATIONS NETWORKS, INC. - TX 552      
972-865 2   7670 GRANDE COMMUNICATIONS NETWORKS, INC. - TX 552      
972-865 3   7670 GRANDE COMMUNICATIONS NETWORKS, INC. - TX 552      
972-865 4   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2010-12-13   
972-865 5   5562 METROPCS, INC. 552   2010-09-20   
972-865 6   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2010-12-13   
972-865 7   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2010-12-13   
972-865 8   829J PAETEC ITEL, LLC 552   2012-04-13   
972-865 9   6529 T-MOBILE USA, INC. 552   2025-06-19   
972-866 A DLLSTXADDS0  9533 SOUTHWESTERN BELL 552      
972-866 0   9533 SOUTHWESTERN BELL 552      
972-866 1   9533 SOUTHWESTERN BELL 552      
972-866 2   9533 SOUTHWESTERN BELL 552      
972-866 3   9533 SOUTHWESTERN BELL 552      
972-866 4   004F BANDWIDTH.COM CLEC, LLC - TX 552   2010-11-15   
972-866 5   9533 SOUTHWESTERN BELL 552      
972-866 6   9533 SOUTHWESTERN BELL 552      
972-866 7   9533 SOUTHWESTERN BELL 552      

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

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