This just means someone from DTE was trying to call you. My dad works for DTE and if he calls me from a facility phone instead of his cell phone, this is the automatic number that comes up. Usually it's personal calls though - business calls will come from a different number, like an 800. If it were a business call too, such as for an interview, then they would have left a voicemail. Hope this helps anyone!
Yes it is DTE, you may of contacted them reguarding a power outage. They were calling back to be sure your power was restored and apologize for the inconvenience.