Yes, that number ending in AA is the part number. It shows that it came from an "Alcoa" wheel, which has the following specs:
* 15x8 forged aluminum
* 5 on 4.5" bolt pattern
* Backspacing = 5.5"
* Offset = +25 mm
* Standard wheel with 2004 Rocky Mountain Edition and 2006 65th
Anniversary Edition.