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: 940

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
713-940 A Houston TX HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-940 0 Houston TX   9533 SOUTHWESTERN BELL 560      
713-940 1 Houston TX   197D VONAGE AMERICA LLC 560   2023-10-08   
713-940 2 Houston TX   9533 SOUTHWESTERN BELL 560      
713-940 3 Houston TX   9533 SOUTHWESTERN BELL 560      
713-940 4 Houston TX   9533 SOUTHWESTERN BELL 560      
713-940 5 Houston TX   9533 SOUTHWESTERN BELL 560      
713-940 6 Houston TX   9533 SOUTHWESTERN BELL 560      
713-940 7 Houston TX   6701 AERIAL COMMUNICATIONS, INC. 560   2006-02-10   
713-940 8 Houston TX   9533 SOUTHWESTERN BELL 560      
713-940 9 Houston TX   9533 SOUTHWESTERN BELL 560      

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.