"Unknown host" error
The client shows this common error when it cannot resolve the domain a player is joining with. It usually points to one of these causes:
- The DNS record does not exist or is not set up correctly.
- Your server is blocked by Mojang.
- The DNS change has not reached the player yet.
- The player's DNS server is returning nothing, or the wrong answer.
Check your DNS configuration
Compare your setup against our DNS setup guide and confirm every record matches.
Check whether Mojang blocked your server
If your server is blocked, you can file an appeal with Mojang.
Fix player-side DNS problems
For the DNS issues on a player's side, ask them to switch to a reliable DNS server such as Cloudflare (1.1.1.1) or Google (8.8.8.8).
On Windows, they can also clear cached DNS answers by running ipconfig /flushdns.