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.

NPA: 713 [Rate centres in NPA 713] [Dial plan for NPA 713]

NXX: 972

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
713-972 A Houston TX HSTNTXSUDS0  9533 SOUTHWESTERN BELL 560      
713-972 0 Houston TX   9533 SOUTHWESTERN BELL 560      
713-972 1 Houston TX   9533 SOUTHWESTERN BELL 560      
713-972 2 Houston TX   6701 AERIAL COMMUNICATIONS, INC. 560   2006-03-13   
713-972 3 Houston TX   9533 SOUTHWESTERN BELL 560      
713-972 4 Houston TX   6701 AERIAL COMMUNICATIONS, INC. 560   2005-02-06   
713-972 5 Houston TX   6701 AERIAL COMMUNICATIONS, INC. 560   2005-02-06   
713-972 6 Houston TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2008-05-30   
713-972 7 Houston TX   9533 SOUTHWESTERN BELL 560      
713-972 8 Houston TX   9533 SOUTHWESTERN BELL 560      
713-972 9 Houston TX   9533 SOUTHWESTERN BELL 560      

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.