Originally Posted by
Antarius
Your bags will be tagged through, however you will need to claim them before customs and then drop them off again at PHX.
I don’t know how it will work for OP’s trip via PHX. But, transiting Dallas international-to-international you can check your bags all the way through without claiming at customs. (You will still clear immigration.). You do want to triple check that your bags are tagged correctly (an typically have some additional tape wrapped around them to flag them as transfers.)