From the perspective of the French law, if your service is reachable in France, then you are liable. In practice, Google has an operating branch in France, so

From the perspective of the French law, if your service is reachable in France, then you are liable. In practice, Google has an operating branch in France, so they are weak. Even if they didn't have the branch, in theory, extraterritoriality can still be applied between relatively friendly countries; though taking lot of time and bureaucracy. Even with enemies: Russian company is totally safe from US law, and vice-versa, but they could get under sanctions for "promoting terrorism" (in some way, this could also be argued for these DNS servers as well if we push it a little bit).