Port 27000

This port range (27000-27006) is primarily used for QuakeWorld, an extension to the original Quake multiplayer functionality developed by id Software. QuakeWorld introduced enhanced networking capabilities optimized for latency and connectivity, requiring dedicated master servers to maintain lists of currently available game servers.

QuakeWorld clients typically communicate over UDP with these master servers to request updated server lists and other matchmaking information. Game servers also periodically report their status to the master servers, aiding in accurate matchmaking. This architecture helps reduce connection setup times and streamlines gameplay initialization among players.

While QuakeWorld specifically popularized these port assignments, similar port ranges are often reused in other multiplayer gaming contexts, particularly where lightweight, latency-sensitive communication is necessary. Due to the low overhead and broad compatibility of UDP, it remains the dominant transport protocol in such gaming applications.