Dear OP,

1. Why do you care?
Unless your situation is very, very unusual, IMHO this isn't even worth thinking about. I know that there is lots of stuff on the web about how to manipulate pulls and why it matters. But, mostly, it doesn't. I've gotten and helped others to get many hundreds of bonus cards. Never worried about who was pulling from where, never had much problem getting cards.

2. If you really, really want to know what bureau was pulled by which card company get a copy of your report from the three bureaus. Every pull is listed by creditor on the report from the pulled bureau.