This is a scam. I had these calls on my land line and now they're targeting mobiles. They're phishing for credit card numbers. I have no vehicle, so there's no way that they could be using a purloined warranty registry.
I called them back and gave them a piece of my mind.
I will be going out right now to purchase a sports whistle to deafen these scumbags on future intrusions.
I let my voicemail pick it up. I have had this call for about three weeks now, on and off. It is an automated recording about a car warranty, and that this is the last and final chance to extend the warranty. The recording says to press 1 to speak to a representative, and press 2 to be taken off the list, and then it hangs up on my voicemail.