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Dallas, TX

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
972-764 3   7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
972-764 4   7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
972-764 5   7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
972-764 6   7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
972-764 7   7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
972-764 8   903C ONVOY, LLC - TX 552   2012-08-01   
972-764 9   7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
972-766 A DLLSTXRNDS1  9533 SOUTHWESTERN BELL 552      
972-770 A DLLSTXADDS0  9533 SOUTHWESTERN BELL 552      
972-773 A DLLSTXRNDS0  9533 SOUTHWESTERN BELL 552      
972-773 0   9533 SOUTHWESTERN BELL 552      
972-773 1   9533 SOUTHWESTERN BELL 552      
972-773 2   9533 SOUTHWESTERN BELL 552      
972-773 3   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2010-11-19   
972-773 4   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2011-07-07   
972-773 5   9533 SOUTHWESTERN BELL 552      
972-773 6   9533 SOUTHWESTERN BELL 552      
972-773 7   9533 SOUTHWESTERN BELL 552      
972-773 8   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2010-11-19   
972-773 9   516C AT&T CORP. 552   2011-05-02   
972-774 A DLLSTXADDS0  9533 SOUTHWESTERN BELL 552      
972-774 0   9533 SOUTHWESTERN BELL 552      
972-774 1   9533 SOUTHWESTERN BELL 552      
972-774 2   9533 SOUTHWESTERN BELL 552      
972-774 3   9533 SOUTHWESTERN BELL 552      
972-774 4   9533 SOUTHWESTERN BELL 552      
972-774 5   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2011-08-02   
972-774 6   9533 SOUTHWESTERN BELL 552      
972-774 7   9533 SOUTHWESTERN BELL 552      
972-774 8   5562 METROPCS, INC. 552   2015-01-28   
972-774 9   9533 SOUTHWESTERN BELL 552      
972-776 A DLLSTXADDS0  9533 SOUTHWESTERN BELL 552      
972-776 0   9533 SOUTHWESTERN BELL 552      
972-776 1   9533 SOUTHWESTERN BELL 552      
972-776 2   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2011-01-15   
972-776 3   9533 SOUTHWESTERN BELL 552      
972-776 4   004F BANDWIDTH.COM CLEC, LLC - TX 552   2018-07-15   
972-776 5   9533 SOUTHWESTERN BELL 552      
972-776 6   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2011-06-19   
972-776 7   624H ONVOY SPECTRUM, LLC 552   2021-12-19   
972-776 8   9533 SOUTHWESTERN BELL 552      
972-776 9   9533 SOUTHWESTERN BELL 552      
972-777 A DLLSTX3769Z  473F USFON, INC. - TX 552      
972-777 0   903C ONVOY, LLC - TX 552   2020-01-17   
972-777 1   903C ONVOY, LLC - TX 552   2020-01-17   
972-777 2   903C ONVOY, LLC - TX 552   2020-01-17   
972-777 3   903C ONVOY, LLC - TX 552   2020-01-17   
972-777 4   903C ONVOY, LLC - TX 552   2020-01-17   
972-777 5   903C ONVOY, LLC - TX 552   2020-01-17   
972-777 6   903C ONVOY, LLC - TX 552   2020-01-17   
972-777 7   473F USFON, INC. - TX 552   2020-01-16   
972-777 8   473F USFON, INC. - TX 552   2020-01-16   
972-777 9   903C ONVOY, LLC - TX 552   2020-01-17   
972-778 A DLLSTXADDS0  9533 SOUTHWESTERN BELL 552      
972-780 A DLLSTXDVDS0  9533 SOUTHWESTERN BELL 552      
972-783 A DLLSTXRNDS0  9533 SOUTHWESTERN BELL 552      
972-783 0   9533 SOUTHWESTERN BELL 552      
972-783 1   9533 SOUTHWESTERN BELL 552      
972-783 2   9533 SOUTHWESTERN BELL 552      
972-783 3   9533 SOUTHWESTERN BELL 552      
972-783 4   9533 SOUTHWESTERN BELL 552      
972-783 5   624H ONVOY SPECTRUM, LLC 552   2024-01-18   
972-783 6   6529 T-MOBILE USA, INC. 552   2025-06-19   
972-783 7   9533 SOUTHWESTERN BELL 552      
972-783 8   9533 SOUTHWESTERN BELL 552      
972-783 9   9533 SOUTHWESTERN BELL 552      
972-788 A DLLSTXADDS1  9533 SOUTHWESTERN BELL 552      
972-789 A DLLSTXADDS0  9533 SOUTHWESTERN BELL 552      
972-789 0   9533 SOUTHWESTERN BELL 552      
972-789 1   9533 SOUTHWESTERN BELL 552      
972-789 2   9533 SOUTHWESTERN BELL 552      
972-789 3   9533 SOUTHWESTERN BELL 552      
972-789 4   9533 SOUTHWESTERN BELL 552      
972-789 5   9533 SOUTHWESTERN BELL 552      
972-789 6   9533 SOUTHWESTERN BELL 552      
972-789 7   6529 T-MOBILE USA, INC. 552   2025-06-19   
972-789 8   9533 SOUTHWESTERN BELL 552      
972-789 9   9533 SOUTHWESTERN BELL 552      
972-792 A DLLSTXRNDS1  9533 SOUTHWESTERN BELL 552      
972-792 0   9533 SOUTHWESTERN BELL 552      
972-792 1   9533 SOUTHWESTERN BELL 552      
972-792 2   9533 SOUTHWESTERN BELL 552      
972-792 3   9533 SOUTHWESTERN BELL 552      
972-792 4   9533 SOUTHWESTERN BELL 552      
972-792 5   9533 SOUTHWESTERN BELL 552      
972-792 6   9533 SOUTHWESTERN BELL 552      
972-792 7   9533 SOUTHWESTERN BELL 552      
972-792 8   5562 METROPCS, INC. 552   2020-01-07   
972-792 9   004F BANDWIDTH.COM CLEC, LLC - TX 552   2018-07-15   
972-794 A DLLSTXJFDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552      
972-803 A DLLSTXJFPS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552      
972-803 0   5562 METROPCS, INC. 552   2011-03-24   
972-803 1   516C AT&T CORP. 552   2010-09-14   
972-803 2   5562 METROPCS, INC. 552   2011-03-24   
972-803 3   516C AT&T CORP. 552   2010-09-14   
972-803 4   516C AT&T CORP. 552   2010-06-01   
972-803 5   516C AT&T CORP. 552   2010-03-02   
972-803 6   516C AT&T CORP. 552   2010-03-02   
972-803 7   5562 METROPCS, INC. 552   2011-03-24   
972-803 8   516C AT&T CORP. 552   2010-08-05   

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

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