Interstate Alarm Company

Interstate Alarm Company We've been providing peace of mind to homes and businesses in Montana since 1972. In 1972, Interstate Alarm Company was incorporated.

Interstate Alarm Company Story

In the early 1970s, after getting out of the Navy and working for Seattle-based Grinnell-ADT, Butte-born “Spike” McQuiston wanted to get back to his roots. So he returned to Montana, settled in Missoula and joined together partners to start an alarm company/answering service/locksmith shop. When Spike passed away suddenly in 1993, his widow, Lynn, stepped in as the

president and CEO of the company. Lynn's sons, Shawn and Josh joined the business and continue the company’s tradition of providing quality products, installations and customer service. We are Montana's oldest Alarm Company because we do it right!

Happy Father's Day from all of us here at Interstate Alarm Company
06/21/2026

Happy Father's Day from all of us here at Interstate Alarm Company

The experts at Interstate Alarm Company are there when you need them, 24/7. We offer round-the-clock monitoring as well ...
06/20/2026

The experts at Interstate Alarm Company are there when you need them, 24/7. We offer round-the-clock monitoring as well as emergency technical assistance.

Feel safe and protected in your home with a security system from Interstate Alarm Company. We've been providing peace of...
06/20/2026

Feel safe and protected in your home with a security system from Interstate Alarm Company. We've been providing peace of mind to homes and businesses in Montana since 1972.

Happy Friday!
06/19/2026

Happy Friday!

We work closely with our customers to determine security concerns and requirements so that we can create a system that i...
06/18/2026

We work closely with our customers to determine security concerns and requirements so that we can create a system that is just right for you and your needs. We've been providing peace of mind to homes and businesses in Montana since 1972.

One of our favorite customers The Ice Cream Place is hiring 🍦🍔🍨🌭🥤🍦
06/18/2026

One of our favorite customers The Ice Cream Place is hiring 🍦🍔🍨🌭🥤🍦

Many of our new customers this month have come from referrals, one of the best compliments a business can receive! We ap...
06/17/2026

Many of our new customers this month have come from referrals, one of the best compliments a business can receive! We appreciate all of our customers - thank you!

Happy Monday! Make it a great week everyone!
06/15/2026

Happy Monday! Make it a great week everyone!

There's a great big world out there to explore. Do it with peace of mind knowing that your home and business are protect...
06/14/2026

There's a great big world out there to explore. Do it with peace of mind knowing that your home and business are protected by Interstate Alarm Company.

Address

Missoula, MT
59804

Telephone

+18003444546

Website

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