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: DLLSTXLNDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
972-218 A Dallas TX 9533 SOUTHWESTERN BELL 552      
972-218 1 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-218 2 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-218 3 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-218 4 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-218 5 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-218 6 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-218 7 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-218 9 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-227 A Dallas TX 9533 SOUTHWESTERN BELL 552      
972-275 A Dallas TX 9533 SOUTHWESTERN BELL 552      
972-275 0 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-275 1 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-275 2 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-275 3 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-275 4 Dallas TX 9533 SOUTHWESTERN BELL 552      
972-275 5 Dallas TX 9533 SOUTHWESTERN BELL 552      

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

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