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.

Port Isabel, TX

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
956-299 A HRLNTXKX8MD  4290 STPCS JOINT VENTURE, LLC 568      
956-299 0 HRLNTXKX8MD  4290 STPCS JOINT VENTURE, LLC 568      
956-299 1 HRLNTXKX8MD  4290 STPCS JOINT VENTURE, LLC 568      
956-299 2 HRLNTXHGMMD  004F BANDWIDTH.COM CLEC, LLC - TX 568   2014-05-16   
956-299 3 HRLNTXHGMMD  004F BANDWIDTH.COM CLEC, LLC - TX 568   2015-09-11   
956-299 4 HRLNTXHGXYX  793K TWC IP ENABLED SERVICES, LLC 568   2014-11-27   
956-299 5 HRLNTXHGMMD  004F BANDWIDTH.COM CLEC, LLC - TX 568   2015-09-11   
956-299 6 HRLNTXKX8MD  4290 STPCS JOINT VENTURE, LLC 568      
956-299 7 HRLNTXKX8MD  4290 STPCS JOINT VENTURE, LLC 568   2006-12-29   
956-299 8 HRLNTXHGMMD  004F BANDWIDTH.COM CLEC, LLC - TX 568   2011-01-09   
956-299 9 HRLNTXKX8MD  4290 STPCS JOINT VENTURE, LLC 568      
956-426 A HRLNTXHGX1X  903C ONVOY, LLC - TX 568      
956-426 0 HRLNTXHGX1X  903C ONVOY, LLC - TX 568   2017-05-19   
956-426 1 HRLNTXHGMMD  004F BANDWIDTH.COM CLEC, LLC - TX 568   2017-10-16   
956-426 2 HRLNTXHGX1X  903C ONVOY, LLC - TX 568   2020-08-24   
956-426 3 HRLNTXHGX1X  903C ONVOY, LLC - TX 568   2020-08-24   
956-426 4 HRLNTXKX8MD  4290 STPCS JOINT VENTURE, LLC 568   2020-09-14   
956-426 5 HRLNTXKX8MD  4290 STPCS JOINT VENTURE, LLC 568   2020-09-14   
956-426 6 HRLNTXHGX1X  903C ONVOY, LLC - TX 568   2021-09-06   
956-426 7 HRLNTXHGX1X  903C ONVOY, LLC - TX 568   2021-09-06   
956-426 8 HRLNTXHGMMD  004F BANDWIDTH.COM CLEC, LLC - TX 568   2020-08-13   
956-426 9 HRLNTXHGXYX  793K TWC IP ENABLED SERVICES, LLC 568   2017-09-20   
956-433 A HRLNTXKX8MD  4290 STPCS JOINT VENTURE, LLC 568      
956-433 0 MCALTX930MD  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 568   2007-03-05   
956-433 1 HRLNTXKX8MD  4290 STPCS JOINT VENTURE, LLC 568      
956-433 2 HRLNTXHGMMD  004F BANDWIDTH.COM CLEC, LLC - TX 568   2014-05-16   
956-433 3 HRLNTXHGMMD  004F BANDWIDTH.COM CLEC, LLC - TX 568   2009-02-13   
956-433 4 HRLNTXKX8MD  5562 METROPCS, INC. 568   2007-03-01   
956-433 5 HRLNTXHGXYX  793K TWC IP ENABLED SERVICES, LLC 568   2007-03-27   
956-433 6 HRLNTXKX8MD  4290 STPCS JOINT VENTURE, LLC 568      
956-433 7 HRLNTXKX8MD  4290 STPCS JOINT VENTURE, LLC 568      
956-433 8 HRLNTXKX8MD  4290 STPCS JOINT VENTURE, LLC 568      
956-433 9 HRLNTXKX8MD  4290 STPCS JOINT VENTURE, LLC 568      
956-524 A HRLNTXKX8MD  5562 METROPCS, INC. 568      
956-524 0 HRLNTXHGMMD  004F BANDWIDTH.COM CLEC, LLC - TX 568   2017-03-31   
956-524 1 HRLNTXDU7MD  145J TERRA NOVA TELECOM INC. 568   2024-04-23   
956-524 2 HRLNTXHGFMD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 568   2014-05-30   
956-524 3 HRLNTXHGMMD  004F BANDWIDTH.COM CLEC, LLC - TX 568   2010-03-07   
956-524 4 HRLNTXHGMMD  004F BANDWIDTH.COM CLEC, LLC - TX 568   2011-03-20   
956-524 5 HRLNTXHGMMD  004F BANDWIDTH.COM CLEC, LLC - TX 568   2011-04-03   
956-524 6 HRLNTXKX8MD  4290 STPCS JOINT VENTURE, LLC 568   2007-06-29   
956-524 7 HRLNTXKX8MD  5562 METROPCS, INC. 568   2007-06-29   
956-524 8 HRLNTXHGXYX  793K TWC IP ENABLED SERVICES, LLC 568   2011-01-14   
956-524 9 MCALTX96HMD  7399 WESTEL, INC. - TX 568   2009-12-14   
956-697 A HRLNTXHGX1X  903C ONVOY, LLC - TX 568      
956-697 0 HRLNTXHG8MD  073H TELNYX LLC 568   2021-03-28   
956-697 1   515J IP HORIZON LLC 568   2022-03-31   
956-697 2 HRLNTXDU2MD  939H COMMIO, LLC 568   2022-12-12   
956-697 3 HRLNTXHGXKX  624H ONVOY SPECTRUM, LLC 568   2021-12-04   
956-697 4 HRLNTXHGXKX  624H ONVOY SPECTRUM, LLC 568   2021-12-04   
956-697 5 HRLNTXHGXPX  515J IP HORIZON LLC 568   2023-12-28   
956-697 6 HRLNTXHGXKX  624H ONVOY SPECTRUM, LLC 568   2021-06-24   
956-697 7 HRLNTXHGX1X  903C ONVOY, LLC - TX 568   2021-10-16   
956-697 8 HRLNTXHGX1X  903C ONVOY, LLC - TX 568   2021-10-16   
956-697 9 HRLNTXHGXPX  515J IP HORIZON LLC 568   2023-12-28   
956-761 A PTISTXSPRS0  9533 SOUTHWESTERN BELL 568      
956-761 0 PTISTXSPRS0  9533 SOUTHWESTERN BELL 568      
956-761 1 PTISTXSPRS0  9533 SOUTHWESTERN BELL 568      
956-761 2 PTISTXSPRS0  9533 SOUTHWESTERN BELL 568      
956-761 3 PTISTXSPRS0  9533 SOUTHWESTERN BELL 568      
956-761 4 PTISTXSPRS0  9533 SOUTHWESTERN BELL 568      
956-761 5 PTISTXSPRS0  9533 SOUTHWESTERN BELL 568      
956-761 6 PTISTXSPRS0  9533 SOUTHWESTERN BELL 568      
956-761 7 PTISTXSPRS0  9533 SOUTHWESTERN BELL 568      
956-761 8 PTISTXSPRS0  9533 SOUTHWESTERN BELL 568      
956-761 9   515J IP HORIZON LLC 568   2025-05-04   
956-772 A PTISTXSPRS0  9533 SOUTHWESTERN BELL 568      
956-772 0 HRLNTXATTMD  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 568   2013-04-29   
956-772 1 PTISTXSPRS0  9533 SOUTHWESTERN BELL 568      
956-772 2 MCALTXHBDS0  4866 SMARTCOM TELEPHONE, LLC 568   2004-03-17   
956-772 3 MCALTX930MD  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 568   2007-01-12   
956-772 4 MCALTX930MD  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 568   2004-05-20   
956-772 5 HRLNTXHGBMD  319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 568   2005-10-20   
956-772 7 HRLNTXHGXYX  793K TWC IP ENABLED SERVICES, LLC 568   2016-01-25   
956-772 8 HRLNTXATYMD  516C AT&T CORP. 568   2012-12-07   
956-772 9 PTISTXSPRS0  9533 SOUTHWESTERN BELL 568      
956-943 A PTISTXPIRS0  9533 SOUTHWESTERN BELL 568      
956-943 0 PTISTXPIRS0  9533 SOUTHWESTERN BELL 568      
956-943 1 PTISTXPIRS0  9533 SOUTHWESTERN BELL 568      
956-943 2 PTISTXPIRS0  9533 SOUTHWESTERN BELL 568      
956-943 3 PTISTXPIRS0  9533 SOUTHWESTERN BELL 568      
956-943 4 PTISTXPIRS0  9533 SOUTHWESTERN BELL 568      
956-943 5 PTISTXPIRS0  9533 SOUTHWESTERN BELL 568      
956-943 6 PTISTXPIRS0  9533 SOUTHWESTERN BELL 568      
956-943 7 PTISTXPIRS0  9533 SOUTHWESTERN BELL 568      
956-943 8   515J IP HORIZON LLC 568   2025-05-04   
956-943 9 HRLNTXHGMMD  004F BANDWIDTH.COM CLEC, LLC - TX 568   2012-11-24   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.