This number calls my cell phone in the middle of the night all the time. Last night it did it 3 times at 2 in the morning. When I call back, a recording says that number is not accepting calls at this time.
Don't assume. It could be one of those relentless organizations trying to reach someone he does not even know. The previous responder should have gave you that exact information from Craigs list if he/she was so sure. Don't Panic Until you have the facts.