The subnet is an interconnected structure made of various areas, called submachines, each of which is defined by a characteristic theme. Each submachine is broken into smaller divisions called locations. The term "Net" refers to the fact that all the areas seem to be connected together via portals, which are able to teleport the player across physical space. Most, if not all, of the subnet is believed to be located underground. How much space it truly takes up, and even where it is, is unknown. Some sources say that the Subnet is located underneath a place called Kent.