I got this call today and got the same thing as other callers. Except instead of returning the call I put in the caller id and this is where it sent me
Caller asked "Is this (my full name)?" When I said "yes", he proceeded to give my detailed address down to zip code and asked if that was right. When I said "yes" again, he then asked if I had diabetes. At that point I objected to his asking for personal information and I asked him who the information was for. He said that he hadn't asked for any personal information. When I said that his asking my name and address was personal. He sounded exasperated and said "If you'll give me a chance I'll tell you." I persisted in objecting to his asking me personal questions without telling me why. He abruptly hung up.