found this number as the costco citi card number in browser search. Thinking its legitimate, I called and then they said I will get $100 gift certificate and after talking 10min, they said there will be one time $2.95 charge, I was not sure and then they said they will give a confirmation number and will be certified by their validation officer.
FTC Data
At least 1 consumer from California reported phone number 866-241-8684 to the Federal Trade Commission. 100% of complaints reported the call or text message as a robocall or recorded message. The last complaint was on October 1, 2017.
Fontana
Help others by rating this number - was it spam, a business, or something else?
Same as above, but they couldn't get my card to charge, so they wanted another credit card! Asking for all kinds of personal information- my date of birth, make & model of my car, etc. I finally hung up & called Costco at another number and cancelled my card due to they were not legit.