[401-450] Today

: One of the longest-reigning Roman emperors, Theodosius II ruled from 402 until his death in 450. He is most famous for:

The era between 401 and 450 AD was a transformative period marked by political instability and the reshaping of world maps. [401-450]

: The Vandals captured Carthage in 439, establishing it as their capital and further weakening Roman naval control in the Mediterranean. : One of the longest-reigning Roman emperors, Theodosius

: Roman troops officially withdrew from Britain, leaving the region to be settled by Anglo-Saxons and leading to a period of economic and cultural decline. and phone lookup

In modern usage, "401–450" frequently appears in specific administrative and regulatory frameworks. 401 Area Code - Location map, time zone, and phone lookup