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: DLLSTXMEDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
214-267 A Dallas TX 9533 SOUTHWESTERN BELL 552      
214-424 A Dallas TX 9533 SOUTHWESTERN BELL 552      
214-579 A Dallas TX 9533 SOUTHWESTERN BELL 552      
214-583 A Dallas TX 9533 SOUTHWESTERN BELL 552      
214-589 A Dallas TX 9533 SOUTHWESTERN BELL 552      
214-630 A Dallas TX 9533 SOUTHWESTERN BELL 552      
214-631 A Dallas TX 9533 SOUTHWESTERN BELL 552      
214-633 A Dallas TX 9533 SOUTHWESTERN BELL 552      
214-634 A Dallas TX 9533 SOUTHWESTERN BELL 552      
214-635 A Dallas TX 9533 SOUTHWESTERN BELL 552      
214-637 A Dallas TX 9533 SOUTHWESTERN BELL 552      
214-638 A Dallas TX 9533 SOUTHWESTERN BELL 552      
214-640 A Dallas TX 9533 SOUTHWESTERN BELL 552      
214-643 A Dallas TX 9533 SOUTHWESTERN BELL 552      
214-645 A Dallas TX 9533 SOUTHWESTERN BELL 552      
214-648 A Dallas TX 9533 SOUTHWESTERN BELL 552      
214-678 A Dallas TX 9533 SOUTHWESTERN BELL 552      
214-688 A Dallas TX 9533 SOUTHWESTERN BELL 552      
214-689 A Dallas TX 9533 SOUTHWESTERN BELL 552      
214-819 A Dallas TX 9533 SOUTHWESTERN BELL 552      
214-879 A Dallas TX 9533 SOUTHWESTERN BELL 552      
214-905 A Dallas TX 9533 SOUTHWESTERN BELL 552      
214-920 A Dallas TX 9533 SOUTHWESTERN BELL 552      
214-951 A Dallas TX 9533 SOUTHWESTERN BELL 552      
214-962 A Dallas TX 9533 SOUTHWESTERN BELL 552      
469-291 A Dallas TX 9533 SOUTHWESTERN BELL 552      
469-852 A Dallas TX 9533 SOUTHWESTERN BELL 552      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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