this is one of my fav thing about chase which i learn on my own bro ))
you need to learn zipcode of the card holder, so if you have dump with a rare looking name and know where base came from. head to spokeo.com and research this guy!!
next, you call 1-800-432-3117 and enter card number and attempt to find the correct zip )
be careful, if you do too many card from one phone number, it will kill all cards you punch in!!!
good lucks ))