This was Citibank wanting to upgrade me to a Diamond Preferred card. If you are a customer of theirs, they know your name, and also the Do Not Call list does not apply. You can probably ask to get off their list. She spoke fast but I think she said 800-385-0425
. Or try the Cust Svce # on your statement, or the back of your card. I was actually interested in the offer but said "No" (several times) because I don't want to encourage their agressive phone marketing.