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NPA: 281 [Rate centres in NPA 281] [Dial plan for NPA 281]

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
281-501 7 Houston TX HSTNTXYADS5  903C ONVOY, LLC - TX 560   2007-08-10   
281-501 8 Houston TX HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560   2007-10-15   
281-501 9 Houston TX HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560   2007-08-26   
281-502 A Highlands TX HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
281-502 0 Highlands TX BYTWTXXAHMD  903C ONVOY, LLC - TX 560   2017-04-26   
281-502 1 Highlands TX HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
281-502 2 Highlands TX BYTWTXXAHMD  903C ONVOY, LLC - TX 560   2018-04-14   
281-502 3 Highlands TX HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560   2014-09-04   
281-502 4 Highlands TX HSTNTXJAXLX  177F PEERLESS NETWORK OF TEXAS, LLC - TX 560   2019-10-30   
281-502 5 Highlands TX BYTWTXXAHMD  903C ONVOY, LLC - TX 560   2018-11-26   
281-502 6 Highlands TX BYTWTXXAHMD  903C ONVOY, LLC - TX 560   2018-11-26   
281-502 7 Highlands TX HSTSTXJV6MD  508J CENTURYLINK COMMUNICATIONS, LLC 560   2015-05-21   
281-502 8 Highlands TX HSTNTXJAXLX  177F PEERLESS NETWORK OF TEXAS, LLC - TX 560   2018-03-31   
281-502 9 Highlands TX HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
281-503 A Porter Heights TX HSTNTXCLX5Y  7670 GRANDE COMMUNICATIONS NETWORKS, INC. - TX 560      
281-503 0 Porter Heights TX HSTNTXCLX5Y  7670 GRANDE COMMUNICATIONS NETWORKS, INC. - TX 560      
281-503 1 Porter Heights TX HSTNTXGI0MD  004F BANDWIDTH.COM CLEC, LLC - TX 560   2015-02-14   
281-503 2 Porter Heights TX NCGDTXNCKMD  318C CEBRIDGE TELECOM TX , L.P. - TX 560   2014-02-28   
281-503 3 Porter Heights TX HSTNTXCLX5Y  7670 GRANDE COMMUNICATIONS NETWORKS, INC. - TX 560      
281-503 4 Porter Heights TX HSTNTXGI0MD  004F BANDWIDTH.COM CLEC, LLC - TX 560   2015-08-31   
281-503 5 Porter Heights TX HSTNTXYADS5  903C ONVOY, LLC - TX 560   2017-05-28   
281-503 6 Porter Heights TX HSTNTX01MMD  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560   2014-06-23   
281-503 7 Porter Heights TX HSTNTXYADS5  903C ONVOY, LLC - TX 560   2011-11-18   
281-503 8 Porter Heights TX HSTNTXGI0MD  004F BANDWIDTH.COM CLEC, LLC - TX 560   2018-05-27   
281-503 9 Porter Heights TX HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2019-05-05   
281-504 A Houston Suburban TX HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
281-504 0 Houston Suburban TX HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
281-504 1 Houston Suburban TX HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
281-504 2 Houston Suburban TX HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
281-504 3 Houston Suburban TX HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
281-504 4 Houston Suburban TX HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
281-504 5 Houston Suburban TX HSTNTXMOX6X  624H ONVOY SPECTRUM, LLC 560   2022-05-22   
281-504 6 Houston Suburban TX HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
281-504 7 Houston Suburban TX HSTNTXGI0MD  004F BANDWIDTH.COM CLEC, LLC - TX 560   2011-04-28   
281-504 8 Houston Suburban TX HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
281-504 9 Houston Suburban TX HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
281-505 A Katy TX HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
281-505 0 Katy TX HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2019-09-16   
281-505 1 Katy TX HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560   2019-10-20   
281-505 2 Katy TX HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2020-01-11   
281-505 3 Katy TX HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560   2019-04-08   
281-505 4 Katy TX HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2020-03-08   
281-505 5 Katy TX HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2020-03-08   
281-505 6 Katy TX HSTNTX01MMD  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560   2019-04-26   
281-505 7 Katy TX HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2020-03-08   
281-505 8 Katy TX HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2020-03-08   
281-505 9 Katy TX HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2020-07-05   
281-506 A Houston Suburban TX HSTNTXGIDS0  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560      
281-506 0 Houston Suburban TX HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2006-05-07   
281-506 1 Houston Suburban TX HSTNTXGIDS0  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560      

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Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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