UPDATE: I found out that this is a company called IDT. They are attempting to get you to switch your electric supplier.
They buy phone number lists of people eligible for switching. They disregard the fact you are on Do Not Call Lists. You info was made available to them from your Electric Company.
My experience with these types of electric rate reducing companies is that they initially are cheaper, then they raise your rate to 3x the regular supplier's rate. I learned that lesson the hard way.