Door to door AT&T sales people -- is it a scam?

A group of people are on my street today going door to door to sell AT&T fiber. Two came to my door and chated for while and then proceeded to get a lot of info from me to see "if I qualified." They did not show badges but showed some AT&T advertising collateral and used an iPad. Later I got an email from one of them, but he used a gmail address even though it came through to me on a semi-official looking address. They asked for my social security number. That is very suspicious and said no and good bye. No badges where shown or worn.