The Interstellar Spaceport Code is a set of three letters that correspond to the various spaceports. These codes are unique to every spaceport. These codes are set out by the Interstellar Spaceflight Administration (ISA). Spaceports must obtain a Spaceport Code before they can officially begin operation. The codes are usually very similar to the name of the spaceport, and are therefore make it easier to recognize.
The Interstellar Spaceport Code is used mostly for pilots of spacecraft, as it helps to identify the spaceport with ease. The codes are also used by companies to help their customers find their nearest spaceport.