Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 406 [Rate centres in NPA 406] [Dial plan for NPA 406]

NXX: 808

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-808 A Havre MT HLNAMTMAUMD  508J CENTURYLINK COMMUNICATIONS, LLC 648      
406-808 0 Havre MT GRFLMTMAHMD  073H TELNYX LLC 648   2020-08-13   
406-808 3 Havre MT MSSLMTMAYMD  771G TELEPORT COMMUNICATIONS AMERICA MT - LLC 648   2016-03-21   
406-808 4 Havre MT GRFLMTMAKMD  624H ONVOY SPECTRUM, LLC 648   2024-12-27   
406-808 6 Havre MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2021-04-21   
406-808 7 Havre MT HLNAMTMAUMD  508J CENTURYLINK COMMUNICATIONS, LLC 648   2014-05-24   
406-808 8 Havre MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2021-04-21   
406-808 9 Havre MT HLNAMTMAX1X  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 648   2022-08-12   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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