the answer is definately "No". But it may be possible in future.
We actually lose DNA as we get older. When a cell divides, its chromosomes become shorter as a small amount of DNA is lost from each end. Telomeres are long stretches of "junk" DNA at each end of the chromosome that keep important bits of DNA from disappearing. When a cell's telomeres wear out, it stops dividing.
Can we guess someone’s age from how long their DNA is?
Unfortunately, it is not that easy. Everyone is born with different DNA lengths. This means that without knowing how long someone's DNA was at birth, you can only guess their age very roughly. However, if you knew how long the person's telomere was when they were born, you could more accurately guess their age.