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: DLLSTXNMDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
972-270 A Dallas TX 9533 SOUTHWESTERN BELL 552      
972-279 A Dallas TX 9533 SOUTHWESTERN BELL 552      
972-613 A Dallas TX 9533 SOUTHWESTERN BELL 552      
972-613 0 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-613 1 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-613 2 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-613 4 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-613 5 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-613 6 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-613 7 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-613 8 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-613 9 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-681 A Dallas TX 9533 SOUTHWESTERN BELL 552      
972-682 A Dallas TX 9533 SOUTHWESTERN BELL 552      
972-682 0 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-682 1 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-682 2 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-682 3 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-682 4 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-682 5 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-682 6 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-682 7 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-682 9 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-686 A Dallas TX 9533 SOUTHWESTERN BELL 552      
972-686 0 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-686 1 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-686 2 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-686 3 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-686 4 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-686 5 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-686 7 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-686 9 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-698 A Dallas TX 9533 SOUTHWESTERN BELL 552      
972-698 0 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-698 1 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-698 2 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-698 3 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-698 6 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-698 8 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-698 9 Dallas TX 9533 SOUTHWESTERN BELL 552      

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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