No, there has never been a "Communist" nation.
USSR, Cuba, Venezuela are all socialist nations with the govt owning everything. We are on this path.
True "Communism" no one owns anything, it's "to everyone according to their need, from everyone according to their ability's", no one ever figured out a way to organize true communism - because there isn't one for humans. Closest thing to true communism is a bee hive or ant hill, where the insects just do what is needed and how they figure out what is needed the scientists really don't understand. Some of it is a class system - the "queen", "worker" and "soldier" are biologically different from each other. But how they organize the workers and soldiers each day is unknown. Communism can't really even be approached by humans, some of who want power, others want things, others want to be left alone. The real problem is the "wanting", bees and ants don't want, they just do what is necessary.