Ancient sources place Hanno's periplus and career only within "the fifth century BC" as a whole; no ancient or modern source narrows this to a specific birth or death year, and R.C.C. Law notes even the extent of his voyage is disputed, let alone his lifespan.
What would resolve this A securely dated Carthaginian inscription or external synchronism naming Hanno directly, which no currently known source provides.
OpenAncient Mediterranean and Punic chronologyWikipedia: Hanno the Navigator