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.

Onalaska, TX

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
936-646 A ONLSTXXADS0  2068 EASTEX TEL. COOP., INC. 560      
936-746 A HSTNTXJAXGY  516J TON80 COMMUNICATIONS, LLC 560      
936-746 1   583C TIME WARNER CBLE INFO SVC (TX) DBA TIME WARNER CBL 560   2025-11-02   
936-746 4 HSTNTXJAXGY  516J TON80 COMMUNICATIONS, LLC 560   2022-03-17   
936-746 6 HSTNTX01MMD  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560   2022-03-18   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.