I think it was fake. I believe he said "Safe Energy" and I declined my interest. Called WashingtonGas who didn't have a record of this phone number nor the name of this company. I could have misunderstood him, though.
This number appear on my Caller ID today as "Unknown" 301-635-2632, with no message left. Phone numbers that I don't reconize or come across my Caller ID as "Unknown" or "Out of Area", etc., I let my VM handle it. I figure if it's important, they will leave a message and if they don't, oh well. In the past, I have dealt with individual's like these who claim to be working for Washington Gas and yet, when I call Washington Gas directly and give them the information, they have no record of anybody working for them offering customer's a discount, etc.. I have no Idea when these "Bozo's" are calling since the ringer on my phone is off and that alone has made life more enjoyable.