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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Ozona, TX

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
325-392 8 OZONTXXARS0  4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 961      
325-392 9 OZONTXXARS0  4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 961      
325-438 A SANGTXXA6MD  883K AHOI LLC 961   2026-05-15   
325-438 7 SANGTXXA6MD  883K AHOI LLC 961   2026-05-15   

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

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