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.

Keller EMS, TX

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
817-322 A FRSCTXBJPS0  7670 GRANDE COMMUNICATIONS NETWORKS, INC. - TX 552      
817-379 A KLLRTXXADS0  4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-379 0 KLLRTXXADS0  4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-379 1 KLLRTXXADS0  4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-379 2 KLLRTXXADS0  4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-379 3 KLLRTXXADS0  4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-379 4 KLLRTXXADS0  4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-379 5 KLLRTXXADS0  4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-379 6 KLLRTXXADS0  4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-379 7 DLLSTX97X6X  145J TERRA NOVA TELECOM INC. 552   2024-08-29   
817-379 8   515J IP HORIZON LLC 552   2019-05-18   
817-379 9 KLLRTXXADS0  4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-482 A KLLRTXXADS0  4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-482 0 DLLSTX97DSS  177F PEERLESS NETWORK OF TEXAS, LLC - TX 552   2020-11-20   
817-482 1 KLLRTXXADS0  4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-482 2 RONKTXWODS0  7726 SOUTHWESTERN BELL TELEPHONE COMPANY - TX 552   2003-11-17   
817-482 3 DLLSTXALDS4  903C ONVOY, LLC - TX 552   2020-08-17   
817-482 4 DLLSTXJFPS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2005-09-13   
817-482 5 DLLSTX97DSS  177F PEERLESS NETWORK OF TEXAS, LLC - TX 552   2019-05-26   
817-482 6 DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2015-05-23   
817-482 7 RCSNTXHVBMD  516C AT&T CORP. 552   2009-07-31   
817-482 8 DLLSTXHW6MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 552   2016-02-21   
817-482 9 DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2016-09-15   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.