Sources
The five sanctioning bodies
Four majors and the IBO. Each has its own ranking committee, its own mandatory challenger cycle and its own idea of who counts — separately for men and for women.
WBCFounded in 1963 · Mexico, MXWorld Boxing Council
The green and gold. Ranks 40 deep and alone sanctions bridgerweight.
- Men
- 18 div.
- Women
- 16 div.
- Positions
- 1,005
32 champions 
WBAFounded in 1921 · Panama City, PAWorld Boxing Association
The oldest. Keeps a super champion and a regular champion side by side.
- Men
- 17 div.
- Women
- 17 div.
- Positions
- 463
30 champions 
WBOFounded in 1988 · San Juan, PRWorld Boxing Organization
The youngest of the four majors. Publishes a monthly report.
- Men
- 17 div.
- Women
- 16 div.
- Positions
- 471
32 champions 
IBFFounded in 1983 · Springfield, NJInternational Boxing Federation
Strict mandatory cycle. The only one publishing twenty years of archives.
- Men
- 17 div.
- Women
- 17 div.
- Positions
- 446
28 champions 
IBOFounded in 1988 · Miami, FLInternational Boxing Organization
Computer ranking down to 100, published as an image.
- Men
- 17 div.
- Women
- 18 div.
- Positions
- 2,054
7 champions
