<prompt> Human: I just got a text notification today asking about suspicious credit card usage. I call the fraud line, and asked how this can happen. The representative said some people just try random numbers and I was unlucky. Is that even possible?I opened this credit card a year ago, but have never used it. So I dont see anyone could have gotten the numbers.  <response>: The first 6 digits are set based off of bank IIN or BIN and credit card thieves see a lot of numbers so they can get the range pretty close.So you do 1 dollar transactions until it the transaction goes through and bingo you start using it. If you do it as a swipe transaction then no need for the Security code on the back.They just busted a postal worker last year for stealing credit card numbers out of the mail. One just flat out stole the cards but was also writing down the numbers and sending the card on. Waits till you activate it and started using it then started using the card, I am sure he was not the only one doing it.There are 100s of other ways it could have been stolen from the plan where they made it to someone at the bank. 