I just received a phone call from this number and they hung on and said nothing.  So, I did the same and they eventually hung up.  No idea who it is.  It comes up unknown name.

They're calling me a lot, too. And variations on this number.

I reported them to the Do Not Call registry, and filed an official complaint. I suggest others do the same.

https://complaints.donotcall.gov/complaint/complaintcheck.aspx?panel=2

I am getting calls from this number and from different variations of the same. They call every single day.  I do not answer the calls and they leave no message