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.

Venus, TX

<< 1 2

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
972-366 4 DLLSTXALDS4  903C ONVOY, LLC - TX 552   2016-04-08   
972-366 5 DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2015-08-24   
972-366 6 DLLSTXALDS4  903C ONVOY, LLC - TX 552   2011-03-04   
972-366 7 DLLSTXALDS4  903C ONVOY, LLC - TX 552   2016-04-08   
972-366 8 VENSTXXADS0  2154 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
972-366 9   515J IP HORIZON LLC 552   2018-01-11   

<< 1 2

Last updated: Sat, 02 May 2026 12:20:53 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.