Minecraft Protocol Numbers by Version

These versions share the same protocol number — a client from any of them can connect to a server from any other in the same version line.

• 26.1, 26.1.1, 26.1.2 775
• 1.21.9, 1.21.10 773
• 1.21.7, 1.21.8 772
• 1.21.2, 1.21.3 768
• 1.21, 1.21.1 767
• 1.20.5, 1.20.6 766
• 1.20.3, 1.20.4 765
• 1.20, 1.20.1 763
• 1.19.1, 1.19.2 760
• 1.18, 1.18.1 757
• 1.16.4, 1.16.5 754
• 1.11.1, 1.11.2 316
• 1.10, 1.10.1, 1.10.2 210
• 1.9.3, 1.9.4 110
• 1.8, 1.8.1, 1.8.2, 1.8.3, 1.8.4, 1.8.5, 1.8.6, 1.8.7, 1.8.8, 1.8.9 47
• 1.7.6, 1.7.7, 1.7.8, 1.7.9, 1.7.10 5
• 1.7.2, 1.7.4, 1.7.5 4

DataVersion — the world format version: written by level.dat, and the game uses it to determine whether the world needs updating. Worlds saved in a newer version are not recommended to be opened in older versions, and the game will directly warn you: doing so may corrupt the world.

Version 1.7.3 has no numbers in any sources, so it is not listed in the table. DataVersion appeared in 1.9.

Before 1.7.2, the protocol used a different numbering system, and the numbers overlap with newer versions: 47 is both 1.4.2 and 1.8. You can only compare them against each other.

• What Java version is required?
• pack_format
• The .minecraft folder
• Operator levels
• server.properties
• The server checker
• Error: Client incompatible

All wiki content How to join a server?How to update MinecraftLatest Minecraft versionHow to find the server version?How to join a server of a different version?Generator: Server Verification

Data from Minecraft 26.3: Launcher manifest from Mojang, version.json inside each client version, and server.properties, which the server itself creates.