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.

Liberty Hill EACS, TX

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
512-515 A LBHLTXLHRS0  9533 SOUTHWESTERN BELL 558      
512-515 0   9533 SOUTHWESTERN BELL 558      
512-515 1   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 558   2006-04-09   
512-515 2   7551 AUSTIN BESTLINE COMPANY 558   2014-05-21   
512-515 3   903C ONVOY, LLC - TX 558   2016-07-29   
512-515 4   671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 558   2010-12-23   
512-515 5   9533 SOUTHWESTERN BELL 558      
512-515 6   9533 SOUTHWESTERN BELL 558      
512-515 7   9533 SOUTHWESTERN BELL 558      
512-515 8   508J CENTURYLINK COMMUNICATIONS, LLC 558   2014-04-10   
512-515 9   177F PEERLESS NETWORK OF TEXAS, LLC - TX 558   2014-05-02   

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.