Yes, they've called repeatedly. The person on the line says that they have an important business matter to discuss, but they need to confirm the last four digits of my social and my address. I tell them I won't do that without them identifying themselves first, but the person tells me they can't discuss the matter without confirming my social and address first. I told them in that case, it must be a scam, to remove my number from their list and then I hang up.