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.

Switch: KLLRTXXADS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
817-337 A Keller TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-379 A Keller EMS TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-379 0 Keller EMS TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-379 1 Keller EMS TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-379 2 Keller EMS TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-379 3 Keller EMS TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-379 4 Keller EMS TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-379 5 Keller EMS TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-379 6 Keller EMS TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-379 9 Keller EMS TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-431 A Keller TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-482 A Keller EMS TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-482 1 Keller EMS TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-562 A Keller TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-562 1 Keller TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-562 2 Keller TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-562 3 Keller TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-562 4 Keller TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-562 5 Keller TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
817-562 8 Keller TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.