It has not been implemented on a state level without the state also being totalitarian. There have been few tries to do it on a state level, anyways.
However, on a town or district level:
1. Primitive Communism — basically all human history before the agricultural revolution.
2. The Paris Commune — Paris was run by its workers for a few months before bloody suppression by capitalists.
3. The Israeli Kibbutz movement.
4. The Zapatistas in Mexico.
5. The Rojava region in Syria.
Overall, there are many cases in which communism has been successful and sustainable for a long time at a district scale. In case of primitive communism, for thousands of years.
However, on a town or district level:
1. Primitive Communism — basically all human history before the agricultural revolution.
2. The Paris Commune — Paris was run by its workers for a few months before bloody suppression by capitalists.
3. The Israeli Kibbutz movement.
4. The Zapatistas in Mexico.
5. The Rojava region in Syria.
Overall, there are many cases in which communism has been successful and sustainable for a long time at a district scale. In case of primitive communism, for thousands of years.