Citibank N.A. AFAIK, a real phone call.
Someone left message sounding very official. Said they were from Citi Bank Services. I had just noticed I was late paying my bill from email because I had never got the bill that I know of. So I almost called back until I checked the Citi Card customer service phone number and googled this number. I'm Blocking this number that says Spam anyway.
Believe this is a CItiBank collections phone in Jacksonville FL. That said ...We don't have a Costco account so are wary of anything to do with the call or the number. updated 01 March 2019 phone answers '...Welcome to Costco VISA...'
I RECEIVED the call from # 904 525 8137 on 26 of December 2018- and not only that I received the call -BUT I WAS CHARGED FOR THAT CALL. IT IS A SPAM.