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.

Switch: HSTNTXYATMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
346-619 A Houston TX 732J NUSO, LLC 560      
346-619 1 Houston TX 732J NUSO, LLC 560   2023-04-09   
346-781 2 Houston TX 732J NUSO, LLC 560   2024-04-22   
346-781 3 Houston TX 732J NUSO, LLC 560   2024-04-22   
346-826 1 Houston TX 732J NUSO, LLC 560   2024-07-29   
346-826 2 Houston TX 732J NUSO, LLC 560   2024-07-29   
346-826 3 Houston TX 732J NUSO, LLC 560   2024-07-29   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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