This caller calls several times a day and nothing is said when I answer and say hell-o.
Generally the caller disconnects after a few seconds. I don't know what they hope to accomplish as I live in a secure condo building with 24/7 door staff.
This number came up as Cheeseburger in Paradise. This was a great restaurant in Algonquin Commons but has been gone for years. I suspect the phone company reassigned this number. There was no message left.