National Air Cargo is located in Orchard Park, NY a suburb of Buffalo. My son used to work for the company.
This story says Florida based company then in the next paragraph says its based at Willow run.
http://www.annarbor.com/news/ypsilanti/ypsilanti-man-among-7-killed-in-afghan-crash/
Its obviously a global company so I’m guessing this particular plane or crew were Michigan based