Caller had the first and last name tied to my Comcast/Xfinity account. Identified themselves as "calling on behalf of Xfinity" and stated they had "great news" in the form of an offer. I asked them to clarify whether they were Xfinity or if they were a different company calling on _behalf_ of Xfinity. To his credit, he confirmed that they were a separate company.
DO NOT GIVE THESE FOLKS YOUR INFORMATION, NOR CONFIRM YOUR NAME.