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: HSTZTX16DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
346-220 8 Spring TX 763H IP GLOBAL NETWORKS - TX 560      
346-239 5 Richmond-Rosenberg TX 763H IP GLOBAL NETWORKS - TX 560      
346-252 0 Houston Suburban TX 763H IP GLOBAL NETWORKS - TX 560      
346-294 A Houston TX 763H IP GLOBAL NETWORKS - TX 560      
346-294 0 Houston TX 763H IP GLOBAL NETWORKS - TX 560      
346-294 1 Houston TX 763H IP GLOBAL NETWORKS - TX 560      
346-404 A Houston TX 763H IP GLOBAL NETWORKS - TX 560      
346-404 0 Houston TX 763H IP GLOBAL NETWORKS - TX 560      
713-814 7 Houston TX 763H IP GLOBAL NETWORKS - TX 560      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.