Ashur-dan I was one of the longest-reigning Kings of Assyria

Assyria

Assyria was a Semitic Akkadian kingdom, extant as a nation state from the mid–23rd century BC to 608 BC centred on the Upper Tigris river, in northern Mesopotamia , that came to rule regional empires a number of times through history. It was named for its original capital, the ancient city of Assur...

, reigning for some 46 years according to the Assyrian King List. According to one of the short chronology of the middle Assyrian period, he reigned from 1179 BC to 1133 BC.
He succeeded his father, Ninurta-apil-Ekur

Ninurta-apal-Ekur

Ninurta-apal-Ekur, meaning “Ninurta is the heir of the Ekur,” was a King of Assyria in the early 12th Century BC who usurped the throne and styled himself king of the universe and priest of the gods Enlil and Ninurta...

, and was succeeded by his son, Ninurta-tukulti-Ashur

Ninurta-tukulti-Ashur

Ninurta-tukulti-Ashur was briefly King of Assyria in 1133 BC. He succeeded his father, the long-reigning Ashur-dan I, but the throne was very quickly usurped by his brother, Mutakkil-Nusku. Ninurta-tukulti-Ashur was forced to go into exile in Babylonia, with which he had maintained friendly...

. Beyond this, little is known of his long reign.