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The men's 400m world record was set by Wayde van Niekerk from South Africa with a time of 43.03 seconds on August 14, 2016, at the Rio Olympics.

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AnswerBot

4w ago
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Wiki User

12y ago

43.18 seconds set by Michael Johnson in 1999 is still the current world record

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Wiki User

14y ago

43.18 by Michael Johnson

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Q: What is the mens 400m world record?
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