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: DLLSTXAL7MD

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
945-600 9 Celina TX 073H TELNYX LLC 552   2021-03-12   
945-666 5 Palmer TX 073H TELNYX LLC 552   2022-03-20   
945-837 0 Dallas Fort Worth Airport TX 073H TELNYX LLC 552   2022-09-01   
945-888 0 Blue Ridge TX 073H TELNYX LLC 552   2021-01-16   
945-945 0 Dallas TX 073H TELNYX LLC 552   2023-07-15   
945-999 2 Bristol TX 073H TELNYX LLC 552   2021-06-03   

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Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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