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.
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OCN: 4290 STPCS JOINT VENTURE, LLC

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
956-538 6 Brownsville TX   568   2021-03-14   
956-538 7 Brownsville TX   568   2021-03-14   
956-538 8 Brownsville TX   568   2021-03-14   
956-539 9 Laredo TX   566   2019-02-03   
956-543 A Brownsville TX HRLNTXKX8MD  568      
956-543 0 Brownsville TX   568   2007-07-06   
956-543 1 Brownsville TX   568   2006-11-04   
956-543 2 Brownsville TX   568   2007-07-06   
956-543 3 Brownsville TX   568   2007-07-06   
956-543 4 Brownsville TX   568   2007-07-06   
956-543 5 Brownsville TX   568   2007-02-14   
956-543 6 Brownsville TX   568   2006-11-04   
956-543 7 Brownsville TX   568   2007-02-14   
956-543 8 Brownsville TX   568   2007-02-14   
956-543 9 Brownsville TX   568   2006-11-04   
956-545 3 Brownsville TX   568   2004-11-29   
956-545 4 Brownsville TX   568   2005-03-05   
956-545 5 Brownsville TX   568   2004-11-29   
956-545 6 Brownsville TX   568   2004-11-29   
956-545 7 Brownsville TX   568   2004-04-29   
956-545 8 Brownsville TX   568   2004-04-12   
956-545 9 Brownsville TX   568   2004-03-15   
956-551 8 Brownsville TX   568   2014-12-01   
956-558 A McAllen TX HRLNTXKX8MD  568      
956-558 0 McAllen TX   568   2020-10-12   
956-558 2 McAllen TX   568   2021-02-05   
956-558 3 McAllen TX   568   2021-02-05   
956-558 4 McAllen TX   568   2021-02-05   
956-558 7 McAllen TX   568   2021-02-05   
956-558 8 McAllen TX   568   2021-02-05   
956-558 9 McAllen TX   568   2020-10-12   
956-561 6 Brownsville TX   568   2014-12-01   
956-561 7 Brownsville TX   568   2014-12-01   
956-561 8 Brownsville TX   568   2014-12-01   
956-561 9 Brownsville TX   568   2014-12-01   
956-571 A Harlingen TX HRLNTXKX8MD  568      
956-571 0 Harlingen TX   568      
956-571 1 Harlingen TX   568      
956-571 2 Harlingen TX   568      
956-571 3 Harlingen TX   568      
956-571 5 Harlingen TX   568      
956-571 6 Harlingen TX   568      
956-572 9 Brownsville TX   568   2004-12-04   
956-575 A Mission TX HRLNTXKX8MD  568      
956-575 0 Mission TX   568   2020-10-16   
956-575 1 Mission TX   568   2020-10-16   
956-575 2 Mission TX   568   2020-10-16   
956-575 3 Mission TX   568   2020-10-16   
956-575 4 Mission TX   568   2020-10-16   
956-575 5 Mission TX   568   2020-10-16   

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

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