Serial anonymous caller, leaves no messages, marked on my phone as originating in Angola, DE. Could be insurance sales, but I can't confirm that. I blocked it, but looked it up again because I couldn't remember why I had it blocked in the first place. Another user on another site reported that after multiple calls with no msgs, he called the number back, they answered with, "Thanks for returning our call..." but no company name, and when he asked the representative to identify the company and purpose for calling that person hung up.... so. I didn't bother to call the number.