You can play Undermine by adding the server in the Minecraft launcher.

On Minecraft Java Edition, open the Minecraft launcher. Click “Multiplayer” and then “Add Server” and enter the Undermine IP Address 45.77.51.239 in the “Server Address”. Then press “Done” and start playing.

For Minecraft Java Edition, the Undermine IP is 45.77.51.239.

To join Undermine, follow the instructions on how to play above.

In Undermine, you can play FTB.

To vote for Undermine, click the vote button at the top of the page. Then enter your Minecraft username and click “Vote”.