From Traveller Wiki - Science-Fiction Adventure in the Far future
The Ley Sector. This sector was known as Makhuniim during the First Imperium.
The sector capital is Dukh/Nightmare (Ley 1210)
Bounded to Coreward-Trailing and Rimward-Spinward by areas of rift, Ley Sector lies at the very edge of the Third Imperium. The sector lies between two rifts, and provides a “gateway” into or out of Imperial space (hence the Domain name) towards the Hive Federation and the Two Thousand Worlds.
Fornast Sector (to Spinward) leads to the Imperial Core, while some trade comes in from Antares and the Empty Quarter away to Spinward-Coreward and Coreward respectively. Other than a few worlds in the Glimmerdrift Reaches, to Rimward, the sector has no other borders with Imperial space.