These guys are persistent. I got 5 calls from them in 10 minutes. No message left on my machine. I, too, do not answer calls from numbers I do not recognize.
I called them back. It is a follow up call from asking for an insurance quote online. Just give them a ring back or don't provide a phone number with your online insurance request.
Just got a call from 218-955-3049 from a guy also about some insurance quotes. What a way to make a buck. Why not get a real decent job, with benefits??