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: FTWOTXCEDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
682-286 A Fort Worth TX 9533 SOUTHWESTERN BELL 552      
817-230 A Fort Worth TX 9533 SOUTHWESTERN BELL 552      
817-231 A Fort Worth TX 9533 SOUTHWESTERN BELL 552      
817-232 A Fort Worth TX 9533 SOUTHWESTERN BELL 552      
817-234 A Fort Worth TX 9533 SOUTHWESTERN BELL 552      
817-245 A Fort Worth TX 9533 SOUTHWESTERN BELL 552      
817-306 A Fort Worth TX 9533 SOUTHWESTERN BELL 552      
817-439 A Fort Worth TX 9533 SOUTHWESTERN BELL 552      
817-847 A Fort Worth TX 9533 SOUTHWESTERN BELL 552      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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