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: HSTNTXRIDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
281-390 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-390 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-440 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-701 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-715 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-741 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-743 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-746 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-747 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-748 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-749 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-842 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-889 A Houston TX 9533 SOUTHWESTERN BELL 560      
832-487 A Houston TX 9533 SOUTHWESTERN BELL 560      
832-842 A Houston TX 9533 SOUTHWESTERN BELL 560      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.