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!

The Griz take on Southern Utah tonight in Washington Grizzly Stadium. Kickoff is at 7:00pm. Go Griz! 🏈
08/29/2026

The Griz take on Southern Utah tonight in Washington Grizzly Stadium. Kickoff is at 7:00pm. Go Griz! 🏈

Happy Friday!
08/28/2026

Happy Friday!

There's a great big world out there to explore. Do it with peace of mind knowing that your home and business are protect...
08/27/2026

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

National Dog Day celebrates all breeds, and helps bring attention to the number of dogs that need to be rescued each yea...
08/26/2026

National Dog Day celebrates all breeds, and helps bring attention to the number of dogs that need to be rescued each year.
National Dog Day also honors dogs that work selflessly to save lives, keep us safe and bring comfort. Happy National Dog Day! 🐾💕

Recent customer comment - "We've been with Interstate Alarm Company for 40 years now. We're incredibly happy with their ...
08/25/2026

Recent customer comment - "We've been with Interstate Alarm Company for 40 years now. We're incredibly happy with their products and service" - Thank you! We love hearing from our customers!

Happy Friday!
08/21/2026

Happy Friday!

If this is your idea of home security, it's time to give us a call.
08/18/2026

If this is your idea of home security, it's time to give us a call.

Address

Missoula, MT
59804

Telephone

+18003444546

Website

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