How to transfer dte service? Register or sign in at dteenergy.com. After registering, you can enroll your properties in ATS. Complete an Authorization for Automatic Transfer of Service Form and email it to [email protected] or mail it to the address on the form. Contact Landlord Customer Care at (800) 482-8720. Select option 2 for assistance.What is the customer service number for direct energy? Direct Energy Customer Service Phone Number. The Customer Service Phone Number of Direct Energy is: 888-305-3828 / 416-758-8700 / 1-713-877-3500. Direct Energy is an retailer company that deals in electricity, natural gas and other energy services. The direct energy company is the largest competitive retailer of energy services in USA.What is energy phone number? Phone Number of First Energy is + 1-888-544-4877, +1 800-633-4766 . FirstEnergy is a public electric utility that provides sex a vast array of Energy services from electricity generation, distribution, transmission, energy management and other energy related services.