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: HSTNTXOVDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
713-263 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-290 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-316 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-476 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-556 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-586 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-602 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-613 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-680 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-681 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-682 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-683 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-684 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-685 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-686 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-688 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-812 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-956 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-957 A Houston TX 9533 SOUTHWESTERN BELL 560      

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

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