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: SMLKTXSMDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
281-343 A Smithers Lake EMS TX 9533 SOUTHWESTERN BELL 560      
281-343 0 Smithers Lake EMS TX 9533 SOUTHWESTERN BELL 560      
281-343 1 Smithers Lake EMS TX 9533 SOUTHWESTERN BELL 560      
281-343 2 Smithers Lake EMS TX 9533 SOUTHWESTERN BELL 560      
281-343 5 Smithers Lake EMS TX 9533 SOUTHWESTERN BELL 560      
281-343 6 Smithers Lake EMS TX 9533 SOUTHWESTERN BELL 560      
281-343 7 Smithers Lake EMS TX 9533 SOUTHWESTERN BELL 560      
281-343 8 Smithers Lake EMS TX 9533 SOUTHWESTERN BELL 560      
281-343 9 Smithers Lake EMS TX 9533 SOUTHWESTERN BELL 560      
281-545 A Smithers Lake TX 9533 SOUTHWESTERN BELL 560      
281-545 1 Smithers Lake TX 9533 SOUTHWESTERN BELL 560      
281-545 2 Smithers Lake TX 9533 SOUTHWESTERN BELL 560      
281-545 6 Smithers Lake TX 9533 SOUTHWESTERN BELL 560      
281-545 8 Smithers Lake TX 9533 SOUTHWESTERN BELL 560      
281-545 9 Smithers Lake TX 9533 SOUTHWESTERN BELL 560      
281-937 A Smithers Lake EMS TX 9533 SOUTHWESTERN BELL 560      
281-937 0 Smithers Lake EMS TX 9533 SOUTHWESTERN BELL 560      
281-937 1 Smithers Lake EMS TX 9533 SOUTHWESTERN BELL 560      
281-937 9 Smithers Lake EMS TX 9533 SOUTHWESTERN BELL 560      

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.