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Houston, TX

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
713-571 2   903C ONVOY, LLC - TX 560   2021-08-01   
713-571 3   9533 SOUTHWESTERN BELL 560      
713-571 4   9533 SOUTHWESTERN BELL 560      
713-571 5   9533 SOUTHWESTERN BELL 560      
713-571 6   9533 SOUTHWESTERN BELL 560      
713-571 7   9533 SOUTHWESTERN BELL 560      
713-571 8   9533 SOUTHWESTERN BELL 560      
713-571 9   9533 SOUTHWESTERN BELL 560      
713-572 A HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-572 0   9533 SOUTHWESTERN BELL 560      
713-572 1   9533 SOUTHWESTERN BELL 560      
713-572 2   9533 SOUTHWESTERN BELL 560      
713-572 3   9533 SOUTHWESTERN BELL 560      
713-572 4   9533 SOUTHWESTERN BELL 560      
713-572 5   6701 AERIAL COMMUNICATIONS, INC. 560   2006-03-13   
713-572 6   9533 SOUTHWESTERN BELL 560      
713-572 7   6701 AERIAL COMMUNICATIONS, INC. 560   2006-03-13   
713-572 8   9533 SOUTHWESTERN BELL 560      
713-572 9   9533 SOUTHWESTERN BELL 560      
713-573 A HSTNTXHUDS0  9533 SOUTHWESTERN BELL 560      
713-574 A HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560      
713-574 0   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2006-02-09   
713-574 1   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2005-10-09   
713-574 2   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2005-10-09   
713-574 3   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2005-10-09   
713-574 4   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2005-10-09   
713-574 5   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2005-10-09   
713-574 6   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2005-11-03   
713-574 7   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2005-11-03   
713-574 8   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2005-11-03   
713-574 9   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2005-11-03   
713-576 A HSTNTX01MMD  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560   2024-12-12   
713-576 0   7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560      
713-576 1   7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560      
713-576 2   7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560      
713-576 3   7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560      
713-576 4   7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560      
713-576 5   7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560      
713-576 6   6701 AERIAL COMMUNICATIONS, INC. 560   2007-06-18   
713-576 7   7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560      
713-576 8   7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560      
713-576 9   6701 AERIAL COMMUNICATIONS, INC. 560   2005-02-06   
713-577 A HSTNTX01DS2  7421 AT&T - LOCAL 560      
713-577 0   7421 AT&T - LOCAL 560      
713-577 1   7421 AT&T - LOCAL 560      
713-577 2   7421 AT&T - LOCAL 560      
713-577 3   7421 AT&T - LOCAL 560      
713-577 4   7421 AT&T - LOCAL 560      
713-577 5   7421 AT&T - LOCAL 560      
713-577 6   7421 AT&T - LOCAL 560      
713-577 7   7421 AT&T - LOCAL 560      
713-577 8   7421 AT&T - LOCAL 560      
713-577 9   6701 AERIAL COMMUNICATIONS, INC. 560   2005-02-06   
713-578 A HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
713-578 0   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2005-12-30   
713-578 1   9533 SOUTHWESTERN BELL 560      
713-578 2   9533 SOUTHWESTERN BELL 560      
713-578 3   9533 SOUTHWESTERN BELL 560      
713-578 4   9533 SOUTHWESTERN BELL 560      
713-578 5   9533 SOUTHWESTERN BELL 560      
713-578 6   9533 SOUTHWESTERN BELL 560      
713-578 7   9533 SOUTHWESTERN BELL 560      
713-578 8   9533 SOUTHWESTERN BELL 560      
713-578 9   9533 SOUTHWESTERN BELL 560      
713-579 A HSTOTX42DS2  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560      
713-580 A HSTOTX42DS2  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560      
713-581 A HSTNTXYADS5  903C ONVOY, LLC - TX 560      
713-581 0   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2008-05-08   
713-581 1   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2008-05-09   
713-581 2   829J PAETEC ITEL, LLC 560   2009-10-03   
713-581 3   903C ONVOY, LLC - TX 560   2009-12-18   
713-581 4   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2008-06-04   
713-581 5   624H ONVOY SPECTRUM, LLC 560   2022-05-22   
713-581 6   903C ONVOY, LLC - TX 560   2008-07-05   
713-581 7   903C ONVOY, LLC - TX 560   2008-07-05   
713-581 8   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2008-07-18   
713-581 9   004F BANDWIDTH.COM CLEC, LLC - TX 560   2009-03-07   
713-582 A HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-583 A HSTOTX42DS2  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560      
713-583 0   7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560   2005-02-03   
713-583 1   7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560   2005-02-03   
713-583 2   7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560   2005-02-03   
713-583 3   7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560   2005-02-03   
713-583 4   7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560   2005-02-03   
713-583 5   7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560   2005-02-03   
713-583 6   7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560   2005-02-03   
713-583 7   7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560   2005-02-03   
713-583 8   7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560   2005-02-03   
713-583 9   7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560   2005-02-03   
713-584 A HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-584 0   6701 AERIAL COMMUNICATIONS, INC. 560   2005-07-11   
713-584 1   9533 SOUTHWESTERN BELL 560      
713-584 2   9533 SOUTHWESTERN BELL 560      
713-584 3   6701 AERIAL COMMUNICATIONS, INC. 560   2005-07-11   
713-584 4   9533 SOUTHWESTERN BELL 560      
713-584 5   6701 AERIAL COMMUNICATIONS, INC. 560   2005-10-21   
713-584 6   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2025-08-25   
713-584 7   6701 AERIAL COMMUNICATIONS, INC. 560   2005-07-11   
713-584 8   6701 AERIAL COMMUNICATIONS, INC. 560   2005-07-11   
713-584 9   6701 AERIAL COMMUNICATIONS, INC. 560   2005-07-11   

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

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