Dragons live to be about 1,100-1,200 years on average. A pre-Quad is a dragon which is less than forty years old. A very old dragon may be as old as 1,800 years, not much older though really.
Age scale:
1-10 human kid, 1-40 for dragons
10-20 human growth, 40-100 for dragons
20-50 human middle age, 100-650 for dragons
50-70 human “getting there,” 650-900, getting there for a dragon.
70-95 human is old, 900-1,100 a dragon is old
100- human dead, 1,100-1,200 most dragons die by then.