I just received the same call today, Thank god for your blog. I would of never known about this! I am going to contact the cell phone company and report them. I think you should also report them to your local carrier. This is againtst the Law!
I was getting calls about the "car warranty" from the same people from Nevada numbers before. When searching the Nevada numbers I came across a number that you could call to get your number taken off the list. It worked until now with this number coming from Mass. That number was 1-800-461-6675 and was a digicom company...apparently someone had hacked into their system.
Just got a call from this number on my cell phone. My car is not under my name, it is under my father's, so they should have no record of my cell number. It is a 6 year old Honda. Not exactly a high end car. Complete scam.