Interstate Alarm Company

Call Directions Website

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 experts at Interstate Alarm Company are there when you need them, 24/7. We offer round-the-clock monitoring as well ...
10/22/2026

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.

If this is on your wish list, it's time to give us a call. Interstate Alarm Company has been providing peace of mind to ...
10/21/2026

If this is on your wish list, it's time to give us a call. Interstate Alarm Company has been providing peace of mind to homes and businesses in Montana since 1972.

Worried about frozen pipes in your home or office? We've got sensors for that! Our monitored security systems can help m...
10/20/2026

Worried about frozen pipes in your home or office? We've got sensors for that! Our monitored security systems can help minimize water damage and reduce cost of repairs when sensors are placed where flooding is common.

There's a great big world out there to explore. Do it with peace of mind knowing that your home and business are protect...
10/20/2026

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

The Griz take on The Idaho Vandals today in Washington Grizzly Stadium. Kickoff is at 1:00pm. 🏈
10/17/2026

The Griz take on The Idaho Vandals today in Washington Grizzly Stadium. Kickoff is at 1:00pm. 🏈

Happy Friday!
10/16/2026

Happy Friday!

Here at Interstate Alarm Company, we are sincerely grateful for the opportunity to serve you. We appreciate all of our c...
10/11/2026

Here at Interstate Alarm Company, we are sincerely grateful for the opportunity to serve you. We appreciate all of our customers and thank you for your business!

The Griz take on The Northern Arizona Lumberjacks today in Arizona. Kickoff is at 3:00pm. 🏈
10/10/2026

The Griz take on The Northern Arizona Lumberjacks today in Arizona. Kickoff is at 3:00pm. 🏈

Happy Friday!
10/09/2026

Happy Friday!

Address

Missoula, MT
59804

Telephone

+18003444546

Website

Alerts

Be the first to know and let us send you an email when Interstate Alarm Company posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Shortcuts

Share

Category