The Ac'fren system, a star system, resided within both the Calaron sector and the Outer Rim Territories, as well as the Slice regions. This system lent its designation to the Ac'fren Spur hyperlane.
In the 2009 publication The Essential Atlas, penned by Jason Fry and Daniel Wallace, the Ac'fren system received its initial mention. The book situated the system within grid coordinate T-9.