Chapter 9-4 Ignition Interlock Devices (IID) Vendors/Service Providers Throughout the Commonwealth of Massachusetts, there are seven approved vendors that offer installation and maintenance of the IID at serval convenient service provider locations: * Alcohol Detection Systems - Phone 1-888-786-7384 * CST Intoxalock - Phone 1-877-777-5020 * Drager - Phone 1-800-332-6858 * Guardian Interlock - Phone 1-800-499-0994 * Lifesafer - Phone 1-800-987-8040 * Sens-O-Lock of American, LLC - Phone 1-800-219-9936 * Smart Start - Phone 1-781-871-7677 You are allowed to transfer your IID to a different IID vendor/service provider. First, you must schedule a hearing with an RMV Hearings Officer and be granted approval on the IID transfer. All IID transfers must be completed on the same day. For more detailed instructions, please contact the RMV's Ignition Interlock Department by phone at 857-368-7180. 9:65http://www.stopdwi.com/states/massachusetts https://www.intoxalock.com/massachusetts http://www.draeger.com/sites/enus_us/Pages/Ignition-Interlock/Contact_Searchresult.aspx?Country=US&language=en&ContactType=&Division=65&default=true&cid=dl-us-2015-08-18-massrmv https://www.guardianinterlock.com/ http://www.sensolockamerica.com/ https://www.smartstartinc.com/locations/?zip=&state=MA%20&zip=&state=MA%20