The old division was nato/capitalist block was first world, soviet/communist block was second world and everything else was third world.

The soviet union may be gone, but a lot of the countries that used to be a part of it are still at the same relative standard of living between the developed west and the underdeveloped global south, so could be considered "second world". The biggest example is, of course, russia; yeah, not the best standard of living but a lot better than what a lot of the world is getting.

Yes, the soviet bloc.