What IP do I use to join Unstable SMP?
Use unstable.net as the server address.

Join guide
To join Unstable SMP, add a server in Minecraft Java Edition or Bedrock Edition, enter unstable.net, and join the server.
Java: unstable.net on port 25565. Bedrock: unstable.net on port 19132.
Launch Minecraft Java Edition 1.21+ or a current Bedrock client.
From the main menu, select Multiplayer or Servers.
Click Add Server and name it Unstable SMP.
Enter unstable.net. The IP should be typed exactly as unstable.net.
Save the server, select it, and click Join Server.
Use the Java guide or Bedrock guide for exact steps.
Use unstable.net as the server address.
Yes. Unstable SMP is a public server and does not use a whitelist.
Use Minecraft Java Edition 1.21+ or a current Bedrock client.