I used to work for FirstUSA.  This is the generic number for credit card services.  FirstUSA was bought 4 years ago by Chase Bank, then Chase was bought by JP Morgan.  You may have had a credit inquiry either an offer sent to you or you applied for a card FUSA/Chase/JPMorgan offers.  They handle hundreds of card types.  Everything from United Mileage Plus Visa/Mastercard to the Hello Kitty card.  

But this definetely has to deal with a credit card.  You can call and them to look you up.  They'll ask for you SSN.  Don't worry... the advisor doesn't care and it's only used to see if there are any accounts associated with your SSN.  If they see an account then there's your answer.  If they don't see an account then they'll opt you out of any future offers..  This is the legit number for Chase card services.  I was an advisor for them and repeated this number thousands of times. I'll never forget it.

I used to work for FirstUSA.  This is the generic number for credit card services.  FirstUSA was bought 4 years ago by Chase Bank, then Chase was bought by JP Morgan.  You may have had a credit inquiry either an offer sent to you or you applied for a card FUSA/Chase/JPMorgan offers.  They handle hundreds of card types.  Everything from United Mileage Plus Visa/Mastercard to the Hello Kitty card,

This number has not called me, but was reported with a hard inquiry on my credit report.  It says Chase, Im assuming the bank, but have no recollection of applying for credit, going to a branch to open a checking account, or received a pre-approval for a loan.

I looked into this more, from doing a little research on this number, most sites are reporting this number is associated with First USA, I have no idea who they are.  Damn laws can not protect us consumers