4000 or variation, may refer to: 4000 (number) 4000 BCE, a year in the 4th millennium BC A.D. 4000, the last year of the 4th millennium CE, a century leap year starting on Saturday 4000s AD, a decade, century, millennium in the 5th millennium CE 4000s BCE, a decade, century, millennium in the 5th millennium BC 4000 Hipparchus, an asteroid in the Asteroid Belt, the 4000th asteroid registered Mobro 4000, a barge operated by MOBRO Weather Star 4000, a computer system used to display local forecasts on The Weather Channel Hawker 4000, a supermidsized businessjet Delta 4000, a rocket series Audi 4000, a compact executive sedan 4000 (District of Shkodër), one of the postal codes in Albania 4000-series integrated circuits See also 4000 A.D., a science-fiction board game 4000 series (disambiguation)