Founded in 1947, "Cominform" (Communist Information Bureau) is the common name for what was officially referred to as the Information Bureau of the Communist and Workers' Parties. It was the first official forum of the international communist movement since the dissolution of the Comintern, and confirmed the new realities after World War II, including the creation of an Eastern Bloc.
Created September 1947 by Joseph Stalin, dissolved 17 April 1956.
- Bulgarian Communist Party
- Communist Party of Czechoslovakia
- French Communist Party
- Hungarian Working People's Party
- Italian Communist Party
- Polish United Workers' Party
- Romanian Workers' Party
- Communist Party of the Soviet Union
- Communist Party of Yugoslavia (until its expulsion in June 1948)
- Communist Party of the Free Territory of Trieste (until Yugoslavia's expulsion of 1948)