Here I guess I'll make a more comprehensive directory (only the public servers that I know of of course, and most of them are dead):
Generalmain server:
https://discord.gg/kEksGSJAtlas Gaycord (mostly dead):
https://discord.gg/5uK2rxpYTcord (dead):
https://discord.gg/nztWQmXHandwriting Hell (dead):
https://discord.gg/TgP7DYtPopulistcord (dead):
https://discord.gg/ZSHEK93Nationstates Atlasia (dead):
https://discord.gg/pYk3ufSAtlasiaFremont Region:
https://discord.gg/e33TQxBLincoln Region:
https://discord.gg/ENFzr6fSouthern Region:
https://discord.gg/Z5jazZjAlliance Party (dead):
https://discord.gg/DzXBruxConfederate Party (dead):
https://discord.gg/BHA9hPRProgressive Union Party (dead):
https://discord.gg/qnMEyzUWeatherboy Administration (dead):
https://discord.gg/VR9xDC3Fremont Parliament (dead):
https://discord.gg/p4Pqvxw