Got a call at 9:08 am on my cell phone -- just one ring. They hung up before I could answer. It's obviously a scam of some sort just to see if it's a working number. It's a shame that the Do-Not-Call List does not work.
The phone companies seem totally uninterested in putting a stop to this nonsense and the government seems powerless to do anything. Every once in a while they announce an arrest but it's just a drop in the bucket.
I received a call at 10 last night. I did not recognize the number, but as a college instructor, I received calls from students. Called back this morning and also got dead air. Maybe it is the polar vortex calling!