Always hang up on these callers or waste as much of their time as possible. Their so called warranties are worth less than the paper they are printed on and have more ways to not pay for a supposedly covered repair than a Swiss Cheese has holes. Here are two informative articles about them and a warning from the FTC:

http://www.usa.gov/topics/consumer/scams-fraud/cars/auto-warranty-scams.shtml
http://www.edmunds.com/auto-warranty/third-party-extended-warranty-scams.html
http://www.fcc.gov/guides/auto-warranty-scams

Got a call from this number and caller ID says "Vehicl Prot Ctr".  I did not answer but no message left on my answering machine.  Even if they are legit, I would not use them as they can not abide by the law in regards to the "Do Not Call" list that I am on.

They called this evening and said my warranty was out on my vehicle and I needed to purchase theirs before it was too late.  I laughed out loud and told him not to call. He called me a "redneck" and hung up.

Caller ID says "Auto Alert"  did not answer

I do not any more calls from this number..