Automated call that started to say something like "This call is concerning an important business matter" then hung up. I just got my number; it is unlisted and I haven't given it out, so I know it was nothing to do with business for me. The whole thing smelled of scam. I also suspect that since I didn't speak when I answered, the connection was cut so they could move on to the next intended victim. I have number blocking, so this one will now be added to the list.