How old is near death note?

Near was born in August 24, 1991. He appeared on Episode 26. In episode 26 it was 1994. At the end of Episode 26/start of Episode 27 Near is 13 years old, He started investigating in 2012, So Near is 17 years old when he started to work for SPK (Special Provision for Kira) team in the United States.