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: HSTNTXHUDS0

Remotes:

Switch Switch name Switch type
HSTNTXCHRS0  CHANNELVIEW  RSC 
HSTNTXEERS0  E ELLINGTON  DRL 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
713-233 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-378 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-573 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-910 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-941 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-943 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-944 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-945 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-946 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-947 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-948 A Houston TX 9533 SOUTHWESTERN BELL 560      
832-386 A Houston TX 9533 SOUTHWESTERN BELL 560      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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