Local Calling Guide

Area code/prefix search

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NPA: 817 [Rate centres in NPA 817] [Dial plan for NPA 817]

NXX: 817

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
817-817 A Fort Worth TX DLLSTX3769Z  473F USFON, INC. - TX 552      
817-817 0 Fort Worth TX   139F WORLDCALL INTERCONNECT INC. 552   2023-03-11   
817-817 1 Fort Worth TX   139F WORLDCALL INTERCONNECT INC. 552   2023-03-11   
817-817 2 Fort Worth TX   473F USFON, INC. - TX 552   2023-03-10   
817-817 3 Fort Worth TX   473F USFON, INC. - TX 552   2023-03-10   
817-817 4 Fort Worth TX   473F USFON, INC. - TX 552   2023-03-10   
817-817 5 Fort Worth TX   473F USFON, INC. - TX 552   2023-03-10   
817-817 6 Fort Worth TX   473F USFON, INC. - TX 552   2023-03-10   
817-817 7 Fort Worth TX   473F USFON, INC. - TX 552   2023-03-10   
817-817 8 Fort Worth TX   473F USFON, INC. - TX 552   2023-03-10   
817-817 9 Fort Worth TX   473F USFON, INC. - TX 552   2023-03-10   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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