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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NPA: 406 [Rate centres in NPA 406] [Dial plan for NPA 406]

NXX: 338

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-338 A Browning MT BRNGMTAQDS0  619J SIYEH COMMUNICATIONS 648      
406-338 0 Browning MT GRFLMTMAKMD  624H ONVOY SPECTRUM, LLC 648   2021-11-14   
406-338 1 Browning MT BRNGMTAQDS0  619J SIYEH COMMUNICATIONS 648      
406-338 2 Browning MT BRNGMTAQDS0  619J SIYEH COMMUNICATIONS 648      
406-338 3 Browning MT BRNGMTAQDS0  619J SIYEH COMMUNICATIONS 648      
406-338 4 Browning MT BRNGMTAQDS0  619J SIYEH COMMUNICATIONS 648      
406-338 5 Browning MT BRNGMTAQDS0  619J SIYEH COMMUNICATIONS 648      
406-338 6 Browning MT BRNGMTAQDS0  619J SIYEH COMMUNICATIONS 648      
406-338 7 Browning MT BRNGMTAQDS0  619J SIYEH COMMUNICATIONS 648      
406-338 8 Browning MT BRNGMTAQDS0  619J SIYEH COMMUNICATIONS 648      
406-338 9 Browning MT BRNGMTAQDS0  619J SIYEH COMMUNICATIONS 648      

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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