You are falling right into the laps of scammers. Why? By being curious. That's how the scam starts. Once you phone them, or they start to return the calls - Trouble (and not just in River City) Since you came to 800 notes it is obvious you do not know the owner of the phone number, I also suspect that they left no message, or just hung up. Please remember that if a scammer doesn't talk to you, they make no money. Good place to leave it.