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: MTVRTXXARS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
903-537 A Mount Vernon TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 554      
903-537 2 Mount Vernon TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 554      
903-537 3 Mount Vernon TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 554      
903-537 4 Mount Vernon TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 554      
903-537 7 Mount Vernon TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 554      
903-537 8 Mount Vernon TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 554      

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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