Men's_4_×_400_metres_relay_world_record_progression
The first world record in the 4 x 400 metres for men (athletics) was recognized by the International Amateur Athletics Federation, now known as the International Association of Athletics Federations, in 1912. The IAAF's first record in the event was for a mark set the year before the organization's formation. The men's record has been almost exclusively set by American teams, with one exception by one Jamaican team. To June 21, 2009, the IAAF has ratified 15 world records in the event.[1]