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: BRNGMTAQDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
406-338 A Browning MT 619J SIYEH COMMUNICATIONS 648      
406-338 1 Browning MT 619J SIYEH COMMUNICATIONS 648      
406-338 2 Browning MT 619J SIYEH COMMUNICATIONS 648      
406-338 3 Browning MT 619J SIYEH COMMUNICATIONS 648      
406-338 4 Browning MT 619J SIYEH COMMUNICATIONS 648      
406-338 5 Browning MT 619J SIYEH COMMUNICATIONS 648      
406-338 6 Browning MT 619J SIYEH COMMUNICATIONS 648      
406-338 7 Browning MT 619J SIYEH COMMUNICATIONS 648      
406-338 8 Browning MT 619J SIYEH COMMUNICATIONS 648      
406-338 9 Browning MT 619J SIYEH COMMUNICATIONS 648      
406-573 A Browning MT 619J SIYEH COMMUNICATIONS 648      
406-573 0 Browning MT 619J SIYEH COMMUNICATIONS 648   2021-02-08   

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

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