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.

OCN: 4290 STPCS JOINT VENTURE, LLC

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
956-620 1 Brownsville TX HRLNTXKX8MD  568   2015-09-25   
956-620 4 Brownsville TX HRLNTXKX8MD  568   2015-11-28   
956-620 5 Brownsville TX HRLNTXKX8MD  568   2015-11-28   
956-620 6 Brownsville TX HRLNTXKX8MD  568   2015-11-28   
956-620 7 Brownsville TX HRLNTXKX8MD  568   2015-11-28   
956-620 8 Brownsville TX HRLNTXKX8MD  568   2015-11-28   
956-620 9 Brownsville TX HRLNTXKX8MD  568   2015-09-25   
956-622 0 Harlingen TX HRLNTXKX8MD  568   2004-03-16   
956-622 1 Harlingen TX HRLNTXKX8MD  568   2005-08-22   
956-622 2 Harlingen TX HRLNTXKX8MD  568   2009-01-28   
956-622 6 Harlingen TX HRLNTXKX8MD  568   2011-08-09   
956-622 8 Harlingen TX HRLNTXKX8MD  568   2010-02-20   
956-622 9 Harlingen TX HRLNTXKX8MD  568   2005-04-17   
956-624 A McAllen TX HRLNTXKX8MD  568      
956-626 A San Benito TX HRLNTXKX8MD  568      
956-626 6 San Benito TX HRLNTXKX8MD  568   2011-01-23   
956-626 7 San Benito TX HRLNTXKX8MD  568   2011-01-23   
956-626 9 San Benito TX HRLNTXKX8MD  568   2007-06-16   
956-627 7 McAllen TX HRLNTXKX8MD  568   2014-08-15   
956-627 8 McAllen TX HRLNTXKX8MD  568   2014-08-15   
956-627 9 McAllen TX HRLNTXKX8MD  568   2014-08-15   
956-629 1 Laredo TX SNANTX91X7Y  566   2021-04-12   
956-629 2 Laredo TX SNANTX91X7Y  566   2021-04-12   
956-629 3 Laredo TX SNANTX91X7Y  566   2021-04-12   
956-629 4 Laredo TX SNANTX91X7Y  566   2021-04-12   
956-629 6 Laredo TX SNANTX91X7Y  566   2021-04-12   
956-629 7 Laredo TX SNANTX91X7Y  566   2021-04-12   
956-639 A Brownsville TX HRLNTXKX8MD  568      
956-641 2 Brownsville TX HRLNTXKX8MD  568   2020-09-29   
956-643 0 Brownsville TX HRLNTXKX8MD  568   2022-02-13   
956-643 1 Brownsville TX HRLNTXKX8MD  568   2022-02-13   
956-643 5 Brownsville TX HRLNTXKX8MD  568   2022-02-13   
956-643 6 Brownsville TX HRLNTXKX8MD  568   2022-02-13   
956-643 7 Brownsville TX HRLNTXKX8MD  568   2022-02-13   
956-643 8 Brownsville TX HRLNTXKX8MD  568   2022-02-13   
956-643 9 Brownsville TX HRLNTXKX8MD  568   2022-02-13   
956-644 1 Zapata TX HRLNTXKX8MD  568   2021-08-12   
956-644 2 Zapata TX HRLNTXKX8MD  568   2021-08-12   
956-644 3 Zapata TX HRLNTXKX8MD  568   2021-08-12   
956-644 9 Zapata TX HRLNTXKX8MD  568   2021-08-12   
956-645 A Laredo TX SNANTX91X7Y  566      
956-648 A McAllen TX HRLNTXKX8MD  568      
956-648 0 McAllen TX HRLNTXKX8MD  568      
956-648 1 McAllen TX HRLNTXKX8MD  568      
956-648 2 McAllen TX HRLNTXKX8MD  568      
956-648 3 McAllen TX HRLNTXKX8MD  568      
956-648 4 McAllen TX HRLNTXKX8MD  568      
956-648 5 McAllen TX HRLNTXKX8MD  568      
956-648 6 McAllen TX HRLNTXKX8MD  568      
956-648 7 McAllen TX HRLNTXKX8MD  568      

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Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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