The Londori sector existed within the New Territories area of the Mid Rim. In the year 0 ABY, its boundaries were the Ariarch sector to its north, the Glythe sector to its east, the Chaama sector to its south, and the Belshar sector to its west. By 12 ABY, the Londori sector still had these same borders, and it was then part of the New Republic's domain.
Within this sector was the Londor system, linked to the neighboring Ariarch, Glythe, and Chaama sectors through hyperlanes. The system itself contained the Londori Mental Facility.
The StarWars.com Online Companion for The Essential Atlas reference book from 2009 was the first appearance of the Londor sector. An initial update to the Online Companion incorrectly placed the Londor system in the "Gantus" sector of the Outer Rim Territories, which was a typo for the Dantus sector in the Outer Rim. Subsequent updates to the Online Companion fixed this mistake.