UNKNOWN caller leaves message that if want to be romoved, press certain button that is all. No other reason for the call is mentioned. I do not know anyone with the name of UNKNOWN.
The call I got from this number was from F W Publications. Came up on my caller id. I did not answer. They did not leave a message. They are a publisher of various books and magazines. I looked at their website and I subscribed to one of their magazines last year but did not renew.