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.

Llano, TX

<< 1 2

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
325-423 5 SANGTXXAXNX  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 961      
325-423 6 BWWDTXXATMD  903C ONVOY, LLC - TX 961   2020-07-07   
325-423 7 SANGTXXAXHX  508J CENTURYLINK COMMUNICATIONS, LLC 961   2016-07-28   
325-423 8 BWWDTXXATMD  903C ONVOY, LLC - TX 961   2020-07-07   
325-423 9 SANGTXXAXNX  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 961      

<< 1 2

Last updated: Tue, 16 Jun 2026 00:09:45 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.