The Corridan sector, situated within the Core Worlds, was a designated sector. The Khadaji Singularity resided within its boundaries.
During the time of the Imperial Era, the Corridan sector was positioned centrally along the rim territories controlled by the Galactic Empire, and it was under the protection of the Black Sword Command.
The Corridan sector is only mentioned briefly in Before the Storm: "Black Sword Command defended the center of the Empire's Rim territories. Praxlis, Corridan, the entire Kokash and Farlax sectors." This single line made the exact nature of Praxlis and Corridan unclear. While the Star Wars Encyclopedia and The Complete Star Wars Encyclopedia initially considered Praxlis and Corridan to be planets, The Essential Atlas Online Companion later clarified their designation as sectors.