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: DLLSTXRIXHZ

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
469-466 0 Dallas TX 478J NUSO, LLC 552   2016-06-09   
469-851 A Dallas TX 478J NUSO, LLC 552      
469-851 1 Dallas TX 478J NUSO, LLC 552   2020-09-25   
469-851 2 Dallas TX 478J NUSO, LLC 552   2020-09-25   
682-339 A Keller TX 478J NUSO, LLC 552      
682-339 1 Keller TX 478J NUSO, LLC 552   2021-01-24   
682-339 3 Keller TX 478J NUSO, LLC 552   2023-11-26   
682-350 1 Fort Worth TX 478J NUSO, LLC 552   2016-06-20   
817-562 0 Keller TX 478J NUSO, LLC 552   2020-12-20   
817-623 7 Keller TX 478J NUSO, LLC 552   2023-11-26   
817-951 8 Keller TX 478J NUSO, LLC 552   2024-06-06   
817-951 9 Keller TX 478J NUSO, LLC 552   2024-06-06   
945-303 6 Dallas TX 478J NUSO, LLC 552   2023-11-25   
945-303 7 Dallas TX 478J NUSO, LLC 552   2023-11-25   

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

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