I stumbled upon this page at Intel while trying to identify a motherboard that had no clear model number (the only designation that was obvious was E210882) and thought I’d share, since it was quite helpful. =)
Search by AA numbers
If you know your AA (or Altered Assembly) number, you can use our search engine to find information on your Intel® Desktop Board. You will only need to know the first 6 digits of your board’s AA number (Figure 1). Type these 6 numbers into the search box in the left hand channel (Figure 2), and press the go button.
Note: It is important not to include the -xxx to the number, and only search on the first 6 numbers.
Figure 1: Finding the first 6 digits of your AA number
Figure 2: Entering the 6 digit number into the search box
The image below shows an example of the label placement on a board.