Local Calling Guide

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

NXX: 503

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
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   

Last updated: Tue, 04 May 2021 15:04:27 UTC

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