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
956-424 5 Mission TX HRLNTXKX8MD  568   2004-11-22   
956-426 4 Port Isabel TX HRLNTXKX8MD  568   2020-09-14   
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 2 Mission TX   568   2006-06-09   
956-432 3 Mission TX   568   2006-04-13   
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 4 Port Isabel TX   568   2007-03-01   
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   

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Last updated: Sat, 02 May 2026 12:20:53 UTC

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