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.

Fort Worth, TX

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
817-815 6 FTWOTXEDDS0  9533 SOUTHWESTERN BELL 552   2005-12-22   
817-815 7 FTWOTXEDDS0  9533 SOUTHWESTERN BELL 552   2005-12-22   
817-815 8 FTWOTXEDDS0  9533 SOUTHWESTERN BELL 552   2005-12-22   
817-815 9 FTWOTXEDDS0  9533 SOUTHWESTERN BELL 552   2005-12-22   
817-817 A DLLSTX3769Z  473F USFON, INC. - TX 552      
817-817 0 DLLSTX3769Z  139F WORLDCALL INTERCONNECT INC. 552   2023-03-11   
817-817 1 DLLSTX3769Z  139F WORLDCALL INTERCONNECT INC. 552   2023-03-11   
817-817 2 DLLSTX3769Z  473F USFON, INC. - TX 552   2023-03-10   
817-817 3 DLLSTX3769Z  473F USFON, INC. - TX 552   2023-03-10   
817-817 4 DLLSTX3769Z  473F USFON, INC. - TX 552   2023-03-10   
817-817 5 DLLSTX3769Z  473F USFON, INC. - TX 552   2023-03-10   
817-817 6 DLLSTX3769Z  473F USFON, INC. - TX 552   2023-03-10   
817-817 7 DLLSTX3769Z  473F USFON, INC. - TX 552   2023-03-10   
817-817 8 DLLSTX3769Z  473F USFON, INC. - TX 552   2023-03-10   
817-817 9 DLLSTX3769Z  473F USFON, INC. - TX 552   2023-03-10   
817-820 A FTWOTXEDDS5  9533 SOUTHWESTERN BELL 552      
817-820 0 FTWOTXEDDS5  9533 SOUTHWESTERN BELL 552      
817-820 1 FTWOTXEDDS5  9533 SOUTHWESTERN BELL 552      
817-820 2 FTWOTXEDDS5  9533 SOUTHWESTERN BELL 552      
817-820 3 FTWOTXEDDS5  9533 SOUTHWESTERN BELL 552      
817-820 4 FTWOTXEDDS5  9533 SOUTHWESTERN BELL 552      
817-820 5 FTWOTXEDDS5  9533 SOUTHWESTERN BELL 552      
817-820 6 FTWOTXEDDS5  9533 SOUTHWESTERN BELL 552      
817-820 7 FTWOTXEDDS5  9533 SOUTHWESTERN BELL 552      
817-820 8 FTWOTXEDDS5  9533 SOUTHWESTERN BELL 552      
817-820 9 DLLTTX01CMD  5562 METROPCS, INC. 552   2011-03-02   
817-831 A FTWOTXTEDS0  9533 SOUTHWESTERN BELL 552      
817-834 A FTWOTXTEDS0  9533 SOUTHWESTERN BELL 552      
817-834 0 FTWOTXTEDS0  9533 SOUTHWESTERN BELL 552      
817-834 1 FTWOTXTEDS0  9533 SOUTHWESTERN BELL 552      
817-834 2 FTWOTXTEDS0  9533 SOUTHWESTERN BELL 552      
817-834 3 FTWOTXTEDS0  9533 SOUTHWESTERN BELL 552      
817-834 4 FTWOTXTEDS0  9533 SOUTHWESTERN BELL 552      
817-834 5 FTWOTXTEDS0  9533 SOUTHWESTERN BELL 552      
817-834 6 FTWOTXTEDS0  9533 SOUTHWESTERN BELL 552      
817-834 7 FTWOTXTEDS0  9533 SOUTHWESTERN BELL 552      
817-834 8 FTWOTXTEDS0  9533 SOUTHWESTERN BELL 552      
817-834 9 DLLTTX01CMD  5562 METROPCS, INC. 552   2020-12-28   
817-838 A FTWOTXTEDS0  9533 SOUTHWESTERN BELL 552      
817-840 A DLLSTXTLDS8  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
817-840 0 DLLSTXTLDS8  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
817-840 1 DLLSTXTLDS8  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
817-840 2 DLLSTXTLDS8  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
817-840 3 DLLSTXHM4MD  7982 CAPROCK TELECOMMUNICATIONS CORP. - TX 552   2010-04-02   
817-840 4 DLLSTXTLDS8  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552   2012-11-16   
817-840 5 DLLSTXSQDS2  8958 XO TEXAS, INC. 552   2009-07-10   
817-840 6 DLLSTXSQDS2  8958 XO TEXAS, INC. 552   2009-07-10   
817-840 7 DLLATX37DS6  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2010-12-16   
817-840 8 DLLTTX01CMD  5562 METROPCS, INC. 552   2012-02-23   
817-840 9 DLLSTXTLDS8  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 >>

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.