Missed call. Tried calling blocking my number but it said "Your call cannot be completed at this time. Please try again later." So I called without blocking at the first line of an automated message was that it was for a sweepstakes and that at midnight they would be drawing... I hung up before the rest of the sentence was finished.
Calls and never leaves a message.
This # called my mobile, left no message. Has same first six digits as my mobile.