Bad news time wasting fool.  They are mass calling dozens of numbers at a time.  if you answer you will be identified as a live number potential buyer for a company peddling a pyramid scheme style utility provided (electric I believe) I had my staff track this down and avoid answering like the plague.  If you answer you will be hung up on.  At the same time, however, they are documenting that your phone is a live number.  You will then be the beneficiary of two services. The first is 10 to 15 attempts to get you to switch your electricity provider.  You may pay less, not sure, but the main pitch is that if you sell the service, then find two people to sell under you, and they find two people, you will be rich.  Second, and more fun, is that they will sell your number on the market as an operating solicitable cellular number.