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: DLLSTXALEMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
682-399 A Fort Worth TX 732J NUSO, LLC 552      
682-399 1 Fort Worth TX 732J NUSO, LLC 552   2023-04-09   
682-399 5 Fort Worth TX 732J NUSO, LLC 552   2023-11-24   
682-399 9 Fort Worth TX 732J NUSO, LLC 552   2023-11-24   
817-970 8 Arlington TX 732J NUSO, LLC 552   2024-05-16   
817-971 3 Fort Worth TX 732J NUSO, LLC 552   2024-08-12   
817-971 4 Fort Worth TX 732J NUSO, LLC 552   2024-08-12   
945-256 4 Allen TX 732J NUSO, LLC 552   2024-04-19   
945-320 8 Plano TX 732J NUSO, LLC 552   2024-04-15   
945-335 2 Irving TX 732J NUSO, LLC 552   2024-04-23   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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