A Sburb Station is the name for the bases that are accessed by the exiles in the year 2422. The bases are related to Sburb—in particular the Cruxite Artifacts that each child creates using his or her pre-punched card and most likely come to earth with the meteors. Each base contains a Sburb/Sgrub logo shaped monitor and a keyboard with a familiar looking "==>" button that can be used to contact players that have entered the Medium. They seem to run on nuclear power and carry Sburb related gadgets, such as appearifiers and sendificators, probably to further help with the Exile-player interaction. The Computer Terminals also aid in communicating with the Exiles' associated player.
Each base is related to one of the Homestuck Kids' previous location as well as the Cruxite Artifact that child has produced.
The Skyship Base originates from where Rose Lalonde's house stood and mimics her Cruxite Bottle by acting as a cork, shooting out of an underground bottle.
The Helipod Base originates from where John Egbert's house stood and mimics his Cruxite Apple by falling from a tree that grew from the location, dropping the round base to the ground.
This station is in the shape of a wine bottle. Rose Lalonde creates this base after she uses the Cruxite Bottle to transport her house to The Medium.
It is uncovered by the Wayward Vagabond in 2422. It was underground after erosion had filled in the crater created by Rose's meteor.
It is composed of two pieces, the bottle and the cork. The cork contains the Homestuck Interface Device and is ejected from the bottle before flying to Jade's island.
This station flies using four rockets on its bottom.
The other piece of the station, the bottle, is not seen and may not be a functioning station.
This station is shaped like an egg. It appeared in the air above Wayward Vagabond and Aimless Renegade after the construction of Exile Town. The fourth exile, Windswept Questant, found this base sliced in half and repaired it with her Spirograph Key.
This station is shaped like Becquerel's head. The Windswept Questant reformed it using a Spirograph Key into a panel she uncovered containing the controls to reform it.
Bases for the trolls' Sgrub session also appeared on Alternia following its desolation at the hands of The Reckoning's meteors. The seen bases correspond to the lusus of the server player of whomever the exile in question contacts, and like the Earth stations are situated at the former location of said server player's hive. This does however not mean that the trolls had lusus shaped entry items, since Andrew has stated that their entry items were deliberately left to the imagination and most likely will remain so.
These stations appear to be capable of communicating with more than one player, as both Snowman and Diamonds Droog contact multiple players (two bluebloods and two rustbloods respectively).
The Crab Base was used by Clubs Deuce to communicate with Sollux Captor. In a fit of panic and rage at the voice in his head, Sollux's psychic powers overloaded and destroyed the base.