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: BSTRTXBSBMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
737-350 A Bastrop TX 732J NUSO, LLC 558      
737-350 0 Bastrop TX 732J NUSO, LLC 558   2023-01-14   
737-350 3 Bastrop TX 732J NUSO, LLC 558   2023-11-23   
737-975 1 Austin TX 732J NUSO, LLC 558   2024-12-06   
737-975 2 Austin TX 732J NUSO, LLC 558   2024-12-06   
737-975 3 Austin TX 732J NUSO, LLC 558   2024-12-06   

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

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