World teleporters act as spawn points in all worlds within the game. In worlds that the game generates, there are normally three of these teleporters. In player-owned worlds, there is a base number of three of these teleporters, and the owner can add and remove these teleporters as they please.
There is a range limit for how close these teleporters can be, which is a 50 block radius. In addition, these teleporters offer a protected area that is the size of a micro protector (5 block radius). Other than being limited by how close these can be placed together, there is no known limit on how many world teleporters can be placed in a world.
How to Obtain?
Currently, world teleporters can only be obtained through the purchase of a private world.