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: DLLSTXRNDS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
214-200 2 Dallas TX 9533 SOUTHWESTERN BELL 552      
214-570 A Dallas TX 9533 SOUTHWESTERN BELL 552      
214-575 A Dallas TX 9533 SOUTHWESTERN BELL 552      
214-576 A Dallas TX 9533 SOUTHWESTERN BELL 552      
214-576 0 Dallas TX 9533 SOUTHWESTERN BELL 552      
214-576 1 Dallas TX 9533 SOUTHWESTERN BELL 552      
214-576 2 Dallas TX 9533 SOUTHWESTERN BELL 552      
214-576 3 Dallas TX 9533 SOUTHWESTERN BELL 552      
214-576 4 Dallas TX 9533 SOUTHWESTERN BELL 552      
214-576 5 Dallas TX 9533 SOUTHWESTERN BELL 552      
214-576 7 Dallas TX 9533 SOUTHWESTERN BELL 552      
214-576 9 Dallas TX 9533 SOUTHWESTERN BELL 552      
214-860 6 Dallas TX 9533 SOUTHWESTERN BELL 552      
214-865 0 Dallas TX 9533 SOUTHWESTERN BELL 552   2011-10-16   
214-916 5 Dallas TX 9533 SOUTHWESTERN BELL 552      
469-255 A Dallas TX 9533 SOUTHWESTERN BELL 552      
469-330 A Dallas TX 9533 SOUTHWESTERN BELL 552      
469-624 A Dallas TX 9533 SOUTHWESTERN BELL 552      
469-726 5 Dallas TX 9533 SOUTHWESTERN BELL 552      
469-726 6 Dallas TX 9533 SOUTHWESTERN BELL 552      
469-726 7 Dallas TX 9533 SOUTHWESTERN BELL 552      
469-730 A Dallas TX 9533 SOUTHWESTERN BELL 552      
469-730 1 Dallas TX 9533 SOUTHWESTERN BELL 552      
469-730 8 Dallas TX 9533 SOUTHWESTERN BELL 552      
469-730 9 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-204 8 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-275 7 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-308 3 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-766 A Dallas TX 9533 SOUTHWESTERN BELL 552      
972-773 5 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-773 6 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-792 A Dallas TX 9533 SOUTHWESTERN BELL 552      
972-792 0 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-792 1 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-792 2 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-792 3 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-792 4 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-792 5 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-792 6 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-792 7 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-968 A Dallas TX 9533 SOUTHWESTERN BELL 552      
972-968 0 Dallas TX 9533 SOUTHWESTERN BELL 552      

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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