Monitronics International was founded in 1994 and is one of the three largest security alarm monitoring companies in the United States. Headquartered in Dallas, the company provides burglar and fire alarm monitored security system services approximately 800,000 residential and commercial customers throughout the United States. Monitronics offers telephone land line alarm monitoring as well as cellular phone alarm monitoring. Approximately 800 authorized dealers sell, install, and service its security systems and related equipment to residential and commercial customers. Monitronics monitors its clients' accounts at the company's central supervising station in Dallas. Monitronics moved into its current headquarters at the One Valley View Place located at 2350 Valley View Lane in Dallas, Texas, just off of the Stemmons Freeway. Investment firm ABRY Partners owned more than half of Monitronics until it was sold to Ascent Media Corporation in December 2010.
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