FIFA
In total, FIFA recognises 211 national associations and their associated men's national teams as well as 129 women's national teams; see the list of national football teams and their respective country codes. FIFA has more member states than the UN as FIFA recognises 23 non-sovereign entities as distinct nations, such as the four Home Nations within the United Kingdom and politically disputed territories such as Palestine.
National team appearances in the FIFA World Cup
The FIFA World Cup is an international association football competition contested by the senior men's national teams of the members of the International Federation of Association Football (FIFA, Fédération Internationale de Football Association). The championship has been awarded every four years since the inaugural tournament in 1930, with the exception of 1942 and 1946 when it was not held due to the Second World War. The competition originally featured 16 teams, and later 24, before settling on its current format of 32 teams starting with the 1998 tournament. Teams initially compete in a group stage, with the final 16 progressing to knockout stages to decide the winner.