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.

Ferris, TX

<< 1 2

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
972-544 9 DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2019-06-01   
972-833 A   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2025-04-06   
972-833 0 DLLSTX97DSS  177F PEERLESS NETWORK OF TEXAS, LLC - TX 552   2013-04-21   
972-833 1 DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2015-03-30   
972-833 2 DLLATX37DS6  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2013-10-27   
972-833 3 FTWQTXFH0MD  508J CENTURYLINK COMMUNICATIONS, LLC 552   2014-05-15   
972-833 4 DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2016-07-23   
972-833 5   903C ONVOY, LLC - TX 552   2025-08-17   
972-833 6 DLLSTXALDS4  903C ONVOY, LLC - TX 552   2013-12-06   
972-833 7 DLLSTXALDS4  903C ONVOY, LLC - TX 552   2012-05-18   
972-833 8 DLLSTXALDS4  903C ONVOY, LLC - TX 552   2013-12-06   
972-833 9   515J IP HORIZON LLC 552   2017-12-15   

<< 1 2

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.