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: DLLSTXRIXLZ

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
214-805 6 Dallas TX 732J NUSO, LLC 552   2026-05-28   
214-805 7 Dallas TX 732J NUSO, LLC 552   2026-05-28   
682-398 A Roanoke TX 732J NUSO, LLC 552      
682-398 1 Roanoke TX 732J NUSO, LLC 552   2023-01-13   
817-450 6 Fort Worth TX 732J NUSO, LLC 552   2025-07-18   
817-450 8 Fort Worth TX 732J NUSO, LLC 552   2025-07-18   
945-351 7 Dallas TX 732J NUSO, LLC 552   2024-11-10   
945-351 8 Dallas TX 732J NUSO, LLC 552   2024-11-10   
972-477 8 Plano TX 732J NUSO, LLC 552   2025-05-09   
972-477 9 Plano TX 732J NUSO, LLC 552   2025-05-09   

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

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