Originally Posted by
tods27
You pretty much can't keep the number if you make any changes with Chase between products. The Business and Personal cards would be separate products, thus you would have the number change. You can get more info on this in the Credit Card forum.
Without consulting the other forum, I can report going from OP card to Club card without change numbers (both personal versions). I did need to stay with MC for the Club card to maintain the same account number.