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: HSTNTXSHRS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
281-456 A Sheldon TX 9533 SOUTHWESTERN BELL 560      
281-456 0 Sheldon TX 9533 SOUTHWESTERN BELL 560      
281-456 1 Sheldon TX 9533 SOUTHWESTERN BELL 560      
281-456 5 Sheldon TX 9533 SOUTHWESTERN BELL 560      
281-456 6 Sheldon TX 9533 SOUTHWESTERN BELL 560      
281-456 7 Sheldon TX 9533 SOUTHWESTERN BELL 560      
281-456 8 Sheldon TX 9533 SOUTHWESTERN BELL 560      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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