Same thing - got a call from an area code I don't know anyone. 3/14/13 - just started up. Figuring it's a telemarketing company and they didn't leave a message - this is the second time that number has shown up since 3/12/13. Must have JUST started calling folks.
I had a call and was not home. Voicemail was someone who said my name and nothing else. Guess they did not realize it was my voicemail message answering the call.