Originally Posted by
Homeboy
Embraer 135 - 4 windows aft of the exit row.
Embraer 140 - 5 windows aft of the exit row.
Embraer 145 - 6 windows aft of the exit row.
Another easy was is to look at the tail number. ERJ-135s are all N7xxxx, ERJ-140s are all N8xxxx, ERJ-145s are all N6xxxx or N9xxxx.
CRJ-700s also have winglets, which the ERJs (that AA flies) do not have.