Antoine de Saint-Exupéry was born on June 29, 1900 and died on July 31, 1944. Antoine de Saint-Exupéry would have been 44 years old at the time of death or 111 years old today.
There is no evidence that Saint-Exupery was a Freemason. He may well have been but, if he was, it was unimportant enough that his biographers have not mentioned it.