Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Willis, TX

<< 1 2

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
936-666 2 HSTNTXGI0MD  004F BANDWIDTH.COM CLEC, LLC - TX 560   2012-09-10   
936-666 3 HSTNTXYADS5  903C ONVOY, LLC - TX 560   2012-06-18   
936-666 4 HSTNTXYADS5  903C ONVOY, LLC - TX 560   2013-01-11   
936-666 5 NCGDTXNCKMD  318C CEBRIDGE TELECOM TX , L.P. - TX 560   2012-05-31   
936-666 6 HSTNTXGI0MD  004F BANDWIDTH.COM CLEC, LLC - TX 560   2014-05-12   
936-666 7 HSTNTXYADS5  903C ONVOY, LLC - TX 560   2011-11-18   
936-666 8 HSTNTXJAXLX  177F PEERLESS NETWORK OF TEXAS, LLC - TX 560   2013-04-26   
936-666 9 HSTNTXJAXLX  177F PEERLESS NETWORK OF TEXAS, LLC - TX 560   2013-04-26   
936-701 A   612K CSC VOICE, LLC 560      
936-701 0 HSTNTXGI0MD  004F BANDWIDTH.COM CLEC, LLC - TX 560   2015-05-22   
936-701 1 HSTNTXGI0MD  004F BANDWIDTH.COM CLEC, LLC - TX 560   2014-05-12   
936-701 2 NCGDTXNCKMD  318C CEBRIDGE TELECOM TX , L.P. - TX 560   2014-04-04   
936-701 3 NCGDTXNCKMD  318C CEBRIDGE TELECOM TX , L.P. - TX 560   2014-04-04   
936-701 4 NCGDTXNCKMD  318C CEBRIDGE TELECOM TX , L.P. - TX 560   2014-04-04   
936-701 5 NCGDTXNCKMD  318C CEBRIDGE TELECOM TX , L.P. - TX 560   2014-04-04   
936-701 6 HSTNTXGI0MD  004F BANDWIDTH.COM CLEC, LLC - TX 560   2015-06-10   
936-701 7 HSTSTXJV6MD  508J CENTURYLINK COMMUNICATIONS, LLC 560   2015-05-19   
936-701 8 HSTDTXBGBMD  5562 METROPCS, INC. 560   2014-10-25   
936-701 9 HSTDTXBGBMD  5562 METROPCS, INC. 560   2016-05-29   
936-856 A WILSTXXADS0  4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 560      
936-890 A WILSTXXADS0  4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 560      

<< 1 2

Last updated: Sun, 17 May 2026 03:26:51 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.