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.
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Switch: CRLBTXXAL01

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
325-465 A Carlsbad TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 961      
325-465 2 Carlsbad TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 961      
325-465 4 Carlsbad TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 961      
325-465 5 Carlsbad TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 961      
325-465 8 Carlsbad TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 961      

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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