WBA
Official site of the World Boxing Association. The oldest world sanctioning body also has the most comprehensive website. Features include current champions, lists of past belt holders, championship schedules, rankings, results and records. Also included are individual pages for their five regional sanctioning bodies, an online hall of fame and convention information.
http://www.wbaonline.com/

IBF
Official site of the International Boxing Federation. The IBF is a voluntary association organized by representatives of various athletic commissions for the purpose of obtaining greater efficiency and uniformity in the supervision of professional boxing. This organization promulgates rules, establishes champions and prepares monthly ratings of contenders which are continually updated online.
http://www.ibf-usba-boxing.com/

IBO
Official site of the International Boxing Organization and their regional body, the USBO. The IBO is the only world sanctioning body to develop a proprietary computerized ranking system. The results are independently calculated based on fight results without opinion involved. Results are online along with current champions, news and forums.
http://www.iboboxing.com/

WBC
Official site of the World Boxing Council. An interactive site with opportunities for fan feedback. Also included are championship fight archives, press releases, official merchandise, news, a hall of fame, ratings and upcoming fight schedules.
http://www.wbcboxing.com/

WBO
Official site of the World Boxing Organization. Site includes real time news updates, world rankings, and WBO press releases.
http://www.wbo-int.com/

IABA
Official site of the Irish Amateur Boxing Association. The only amateur boxing association to have a custom built stadium which they manage and control. The IABA site includes boxer profiles, event schedules and medals records of ninety years of Irish Amateur Boxing.
http://www.iaba.ie/

NBA
Official site of the National Boxing Association. The NBA is a world sanctioning body dedicated to assisting and encouraging the sport of boxing throughout the world, and striving to improve the safety and public relations of the sport. Their site includes rankings, lists of title holders and bylaws.
http://www.nbaboxing.com

World Cup Of Boxing
A new and revolutionary competition system for men's professional boxing. Consisting of two main rankings: the Total Ranking and the World Cup Ranking, and this in each weight division.
http://www.worldcupofboxing.com/

NABC
Official site of the North American Boxing Council. The NABC sanctions State, Regional, National and Intercontinental title contests. The NABC brings together the best up-and-coming fighters and assists in their career development as they progress toward world championships. The site also includes 24/7 news, links and membership information.
http://www.nabc.net

Combative Sports
Provides information on safe and fair procedures in combative sports and amateur boxing.
http://www.combativesports.org

NABF
Official site of the WBC affiliated North American Boxing Federation. The NABF is a not for profit regional sanctioning body awarding titles in the Federal District of Mexico, Canada and the United States. Their site includes their constitution, rankings, goals and information about their officers. The online newsletter is updated monthly and back issues are archived.
http://www.nabfnews.com/

EBU
Official website of the European Boxing Union. Includes rankings, champions list, and bylaws.
http://www.boxebu.com

AIBA
Official site of the International Amateur Boxing Association. Includes rules, medical handbook, directory of affiliated federations, event calendar, association releases, commissions, newsletters, photos, and results.
http://www.aiba.org/