2426 River Road
Missoula, MT 59804
(406) 728-4546
464 Ash Road Suite C
Kalispell, MT 59901
(406) 752-6624


Montana’s oldest alarm company - because we do it right!

Interstate Alarm Company sells, installs, services, and monitors:


  • Commercial security and fire systems

  • Residential security and fire systems

  • Critical systems consisting of carbon monoxide, gas, water leak, or temperature sensors

  • Camera systems


We provide 24-hour UL certified central station monitoring and 24-hr on-call emergency technical assistance.


We also have NICET certified technicians to perform annual and semi-annual fire alarm inspections to keep our customers compliant with fire code.




Alarm.com silent knight Digital Monitoring Products Speco Technologies System Sensor ELK


State License #5

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