There is a national do not call list but it can take a little bit of time. You just have to threaten to speak to BBB or file a complaint here https://complaints.donotcall.gov/complaint/complaintcheck.aspx
I received a call from this number, no message left. I am going to assume it is the same as prior reports, that it must have been a solicitation of some sort. Funny, I am on the national "do not call" registry, but now I'm suddenly receiving unknown calls like this.