Who called from 6477155248

Called me today two times and yesterday once.. doesn't leave a message... has to be spam call...its' says long-distance

This number has called three times this week and a couple of times last week. They let the phone ring three or four times and then hang up.  No message is left.

Has anyone picked up the phone to see what they have to say?

I'm getting several calls a day for days now, they hang up
I do not want them calling at all, if it is someone asking for donations of clothing etc. I will burn all my old clothes throw out any household items from this day on.

I answer was something about solar panel