​​​​​​AAdvantage has four defined elite statuses: Gold, Platinum, Platinum Pro, and Executive Platinum. If you hold such status, you would probably know it.

If you hold an AAdvantage credit card which offers a free checked-bag benefit, you will get one free checked bag on flights within the U.S. (and maybe U.S. to Canada, too). The credit card checked-bag benefit does not extend to "international" flights; the status checked-bag benefit applies to all AA-operated flights.

If you have a qualifying credit card and have status, the checked-bag benefits are not additive: you get the checked-bag benefits associated with your status; you do not get an additional checked bag because you also hold the credit card.