UEFN map code. Since the Box PvP map is one of the more popular box fight maps in Fortnite, along with a dedicated player base, it should be relatively easy to spot in the Discover menu in-game.

The map code to access Fortnite Minigame Box PVP is 8532-9413-6963. The username of this game mode's creator is "minigame". Up to sixteen people can play this map in public and private lobbies.