Is there a difference between Unknown, Private and Restricted phone calls?

I’ve received calls on my caller id before that read Private and Unknown (usually bill collectors), but never Restricted, until today. I didn’t answer to find out who it was.

Because of certain things happening in our life right now, it’s possible I may receive harassing phone calls from a private person (not company), this is why I didn’t answer.

Is there a way to tell if this call is from an individual or a call from a company?