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
956-426 5 Port Isabel TX HRLNTXKX8MD  568   2020-09-14   
956-429 1 McAllen TX HRLNTXKX8MD  568   2006-11-26   
956-429 2 McAllen TX HRLNTXKX8MD  568   2006-11-26   
956-429 9 McAllen TX HRLNTXKX8MD  568   2006-03-11   
956-432 5 Mission TX HRLNTXKX8MD  568   2005-04-21   
956-432 7 Mission TX HRLNTXKX8MD  568   2005-03-27   
956-432 8 Mission TX HRLNTXKX8MD  568   2005-03-27   
956-432 9 Mission TX HRLNTXKX8MD  568   2005-03-27   
956-433 A Port Isabel TX HRLNTXKX8MD  568      
956-433 1 Port Isabel TX HRLNTXKX8MD  568      
956-433 6 Port Isabel TX HRLNTXKX8MD  568      
956-433 7 Port Isabel TX HRLNTXKX8MD  568      
956-433 8 Port Isabel TX HRLNTXKX8MD  568      
956-433 9 Port Isabel TX HRLNTXKX8MD  568      
956-434 A Los Fresnos TX HRLNTXKX8MD  568      
956-434 1 Los Fresnos TX HRLNTXKX8MD  568      
956-434 2 Los Fresnos TX HRLNTXKX8MD  568      
956-434 3 Los Fresnos TX HRLNTXKX8MD  568      
956-434 5 Los Fresnos TX HRLNTXKX8MD  568      
956-434 6 Los Fresnos TX HRLNTXKX8MD  568      
956-434 7 Los Fresnos TX HRLNTXKX8MD  568      
956-434 8 Los Fresnos TX HRLNTXKX8MD  568      
956-434 9 Los Fresnos TX HRLNTXKX8MD  568      
956-435 1 Brownsville TX HRLNTXKX8MD  568   2014-04-29   
956-435 2 Brownsville TX HRLNTXKX8MD  568   2014-04-29   
956-435 3 Brownsville TX HRLNTXKX8MD  568   2014-04-29   
956-435 4 Brownsville TX HRLNTXKX8MD  568   2014-04-29   
956-435 5 Brownsville TX HRLNTXKX8MD  568   2014-04-29   
956-435 6 Brownsville TX HRLNTXKX8MD  568   2014-04-29   
956-436 9 Laredo TX SNANTX91X7Y  566   2013-04-05   
956-437 A Roma TX HRLNTXKX8MD  568      
956-437 0 Roma TX HRLNTXKX8MD  568      
956-437 1 Roma TX HRLNTXKX8MD  568      
956-437 2 Roma TX HRLNTXKX8MD  568      
956-437 3 Roma TX HRLNTXKX8MD  568      
956-437 4 Roma TX HRLNTXKX8MD  568      
956-437 5 Roma TX HRLNTXKX8MD  568      
956-437 6 Roma TX HRLNTXKX8MD  568      
956-437 7 Roma TX HRLNTXKX8MD  568      
956-437 8 Roma TX HRLNTXKX8MD  568   2013-01-07   
956-437 9 Roma TX HRLNTXKX8MD  568      
956-439 A Laredo TX SNANTX91X7Y  566      
956-439 0 Laredo TX SNANTX91X7Y  566   2022-09-12   
956-439 1 Laredo TX SNANTX91X7Y  566   2022-09-12   
956-439 2 Laredo TX SNANTX91X7Y  566   2022-09-12   
956-439 3 Laredo TX SNANTX91X7Y  566   2022-09-12   
956-439 4 Laredo TX SNANTX91X7Y  566   2022-09-12   
956-439 5 Laredo TX SNANTX91X7Y  566   2022-09-12   
956-439 6 Laredo TX SNANTX91X7Y  566   2022-09-12   
956-439 7 Laredo TX SNANTX91X7Y  566   2022-09-12   
956-439 8 Laredo TX SNANTX91X7Y  566   2022-09-12   
956-439 9 Laredo TX SNANTX91X7Y  566   2022-09-12   
956-441 3 Laredo TX SNANTX91X7Y  566   2018-09-15   
956-441 4 Laredo TX SNANTX91X7Y  566   2015-11-20   
956-441 5 Laredo TX SNANTX91X7Y  566   2015-11-20   
956-441 6 Laredo TX SNANTX91X7Y  566   2015-11-20   
956-441 7 Laredo TX SNANTX91X7Y  566   2015-11-20   
956-441 8 Laredo TX SNANTX91X7Y  566   2015-11-20   
956-441 9 Laredo TX SNANTX91X7Y  566   2018-09-15   
956-442 5 Brownsville TX HRLNTXKX8MD  568   2014-04-15   
956-442 6 Brownsville TX HRLNTXKX8MD  568   2014-04-15   
956-442 7 Brownsville TX HRLNTXKX8MD  568   2014-04-15   
956-442 8 Brownsville TX HRLNTXKX8MD  568   2014-04-15   
956-445 A Mission TX HRLNTXKX8MD  568      
956-445 0 Mission TX HRLNTXKX8MD  568   2005-08-26   
956-445 2 Mission TX HRLNTXKX8MD  568   2005-10-21   
956-445 3 Mission TX HRLNTXKX8MD  568   2006-01-20   
956-445 4 Mission TX HRLNTXKX8MD  568   2006-03-11   
956-445 6 Mission TX HRLNTXKX8MD  568   2006-10-14   
956-445 7 Mission TX HRLNTXKX8MD  568   2007-01-11   
956-445 9 Mission TX HRLNTXKX8MD  568   2005-05-06   
956-451 9 McAllen TX HRLNTXKX8MD  568      
956-453 3 Harlingen TX   568      
956-453 4 Harlingen TX   568      
956-453 5 Harlingen TX   568      
956-453 6 Harlingen TX   568      
956-453 7 Harlingen TX   568      
956-453 8 Harlingen TX   568      
956-453 9 Harlingen TX HRLNTXKX8MD  568      
956-454 9 Harlingen TX HRLNTXKX8MD  568      
956-455 9 Brownsville TX HRLNTXKX8MD  568      
956-456 A San Benito TX HRLNTXKX8MD  568      
956-456 0 San Benito TX HRLNTXKX8MD  568      
956-456 1 San Benito TX HRLNTXKX8MD  568      
956-456 2 San Benito TX HRLNTXKX8MD  568      
956-456 3 San Benito TX HRLNTXKX8MD  568      
956-456 4 San Benito TX HRLNTXKX8MD  568      
956-456 5 San Benito TX HRLNTXKX8MD  568      
956-456 6 San Benito TX HRLNTXKX8MD  568      
956-456 7 San Benito TX HRLNTXKX8MD  568      
956-456 8 San Benito TX HRLNTXKX8MD  568      
956-456 9 San Benito TX HRLNTXKX8MD  568      
956-458 A Mission TX HRLNTXKX8MD  568      
956-458 0 Mission TX HRLNTXKX8MD  568      
956-458 1 Mission TX HRLNTXKX8MD  568      
956-458 2 Mission TX HRLNTXKX8MD  568      
956-458 3 Mission TX HRLNTXKX8MD  568      
956-458 4 Mission TX HRLNTXKX8MD  568      
956-458 5 Mission TX HRLNTXKX8MD  568      
956-458 6 Mission TX HRLNTXKX8MD  568      

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Last updated: Sat, 21 Mar 2026 23:53:39 UTC

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