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
956-993 0 Brownsville TX HRLNTXKX8MD  568   2025-06-27   
956-993 3 Brownsville TX HRLNTXKX8MD  568   2025-07-10   
956-993 4 Brownsville TX HRLNTXKX8MD  568   2025-07-10   
956-993 5 Brownsville TX HRLNTXKX8MD  568   2025-07-10   
956-993 6 Brownsville TX HRLNTXKX8MD  568   2025-07-10   
956-993 7 Brownsville TX HRLNTXKX8MD  568   2025-07-10   
956-993 8 Brownsville TX HRLNTXKX8MD  568   2025-06-27   
956-993 9 Brownsville TX HRLNTXKX8MD  568   2025-06-27   
956-997 1 Mission TX HRLNTXKX8MD  568   2015-11-30   
956-998 1 Weslaco TX HRLNTXKX8MD  568   2013-01-12   
956-998 2 Weslaco TX HRLNTXKX8MD  568   2013-01-12   

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Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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