I got a call from that number this morning. I called back and a guy called Tom Sims answered. It's a Dealer Product Service for cars. They check in to know how the repairs went. Though how the heck they got my number I don't know.
Had two calls from them in the last three days. My rule - unknown number and no message, I send future calls straight to voice mail since my phone won't allow me to block them. But judging from Moniques' post I'd say it's someone just trying to see if it is a valid phone number or not. I sure haven't had any work done on my vehicle lately so there would be no need for them to call me.