Received a call at 9:52 am EDT and there was no message. I wouldn't call a number back especially not they did not leave a message. Glad I came here! Scammers!
Sometimes places just call to see if anyone answers or there is a message machine. If there is they know it's a valid number that someone will answer and then they can sell that phone number to telemarketers. If you don't recognize the number (especially if it's out of state) don't answer your phone at all!