The IBO was founded in 1988 and incorporated in Illinois in 1992 by John Daddono. The organization was later moved to Florida in 1996 and incorporated in Florida at that time. Ed Levine, who continues to serve as the organization's President became a partner and President of the IBO in 1998.
The organization received some acclaim by implementing a computerized system in the late 1990s that removed subjective elements from the ratings in an effort to bring more credibility to the sport. The IBO has increased its visibility by awarding its championships to champions of more established organizations.
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| Strawweight Minimumweight is a weight class division in combat sports. The most notable of which is in professional boxing where boxers may weigh no more than . This is a relatively new weight category for professionals, first inaugurated by the major boxing sanctioning bodies between 1987 and 1990...
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 Hekkie Budler |
24 September 2011 |
| Junior Flyweight - Professional boxing :The weight limit at light flyweight in professional boxing is 108 pounds . When New York legalized boxing in 1920, the law stipulated a "junior flyweight" class, with a weight limit of 99 pounds. When the National Boxing Association was formed in 1921, it also recognized this...
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| Flyweight Flyweight is a class in boxing which includes fighters weighing less than 112 lb but above 108 lb .-Professional boxing:...
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| Super Flyweight Super flyweight is a weight division in professional boxing. It is alternatively referred to as junior bantamweight and light bantamweight...
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| Bantamweight Bantamweight is usually a class in boxing for boxers who weigh above 115 pounds and up to 118 pounds . However, in Mixed Martial Arts it is 134-136 pounds . Wrestling also has similar weight classes including bantamweight...
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 Vic DarchinyanVakhtang "Vic" Darchinyan is an Armenian professional boxer discovered by HyeFighters. He is a three-division world champion, having won eight titles in three different weight classes. He is a former IBF Flyweight World Champion and a former Undisputed WBA, WBC & IBF Super Flyweight World...
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23 April 2011 |
| Super Bantamweight Super bantamweight is a weight division in professional boxing. The maximum weight for this division is 122 pounds, or roughly 55.34 kilograms....
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Tshifhiwa Munyai Tshifhiwa Munyai is a professional boxer from South Africa who has competed in the bantamweight and featherweight divisions. He is the current holder of the WBA inter-continental bantamweight title and is a former holder of the Commonwealth bantamweight title....
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26 March 2011 |
| Featherweight Featherweight is a weight class division in the sport of boxing. There are similarly named divisions under several Mixed Martial Arts organizations and in Greco-Roman wrestling.-Professional boxing:...
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| Super Featherweight Super featherweight is a weight division in professional boxing. The maximum weight for this division is 130 pounds or 59 kilograms....
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 Will TomlinsonWill Tomlinson is a undefeated Australian super featherweight boxer, based in Sydney, New South Wales, Australia.-Professional career:2008...
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30 November 2011 |
| Lightweight Light-weight is a class of athletes in a particular sport, based on their weight.-Professional boxing:The lightweight division is over 130 pounds and up to 135 pounds weight class in the sport of boxing....
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| Junior Welterweight -Professional boxing:The light welterweight class is a weight division in professional boxing that has a limit of 63.5 kg or 140 pounds...
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| Welterweight Welterweight is a weight class division in combat sports. Originally the term "welterweight" was used only in boxing, but other combat sports like kickboxing, taekwondo and mixed martial arts also began to use it for their own weight division system...
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Chris Van Heerden |
24 September 2011 |
| Junior Middleweight Light Middleweight , is a weight division in professional boxing, above 147 pounds and up to 154 pounds ....
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 Zaurbek BaysangurovZaurbek Baysangurov is a chechen boxer and the current interim WBO Light Middleweight Champion.-Amateur:...
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4 December 2010 |
| Middleweight Middleweight is a division, or weight class, in boxing. Early boxing history is less than exact, but the middleweight designation seems to have begun in the 1840s. In the bare-knuckle era, the first middleweight championship fight was between Tom Chandler and Dooney Harris in 1897...
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 Avtandil Khurtsidze |
13 March 2011 |
| Super Middleweight Super Middleweight is a boxing and Muay Thai weight division that has a weight limit of 168 pounds .- 1960s–1983 :There was interest in a division between Middleweight and Light Heavyweight in the late 1960s, the mid-1970s, and the early 1980s...
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Thomas Oosthuizen Thomas "Tommy Gun" Oosthuizen is a South African professional boxer and the current IBO Super Middleweight champion.. The Ring Magazine presently ranks him at ninth in the Super Middleweight division, while ESPN has him at number ten...
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26 March 2011 |
| Light Heavyweight In boxing, the light heavyweight is a weight division above 168 pounds [12 Stone or 76.204 kilograms] and up to 175 pounds [12.5 stone or 79.38 kilograms]), falling between super middleweight and cruiserweight...
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 Antonio TarverAntonio Deon Tarver , nicknamed the "Magic Man", is a professional boxer from Orlando, Florida and the former WBC, WBA, IBF, & The Ring light heavyweight champion....
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20 July 2011 |
| Heavyweight Heavyweight is a division, or weight class, in boxing. Fighters who weigh over 200 pounds are considered heavyweights by the major professional boxing organizations: the International Boxing Federation, the World Boxing Association, the World Boxing Council, and the World Boxing...
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 Wladimir KlitschkoWladimir Klitschko is a Ukrainian heavyweight boxer. Klitschko is the WBA , IBF, WBO Super, IBO & Ring Magazine Champion. His older brother Vitali Klitschko is the current WBC champion...
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22 April 2006 |