Sector 1: Tigris Sector - Neutral space. Location of the Planet Tigris and adjacent to the Euphrates Sector. Sector contains an Earthforce base.Abel Horn claimed to have spent some time hiding in the Tigris Sector after his ship was destroyed near the Martian moon of Phobos located in Sector 100.
Sector 21: Sh'lassen Sector. Known to be strategically close to both Narn and Centauri space. Location of Akdor. After the success of Operation Sudden Death the Earth Alliance were allowed to establish a permanent presence. The next nearest Earth controlled jumpgate is at Babylon 5.
Sector 47: Region of Minbarispace. In 2258, Jha'dur under the alias Gyla Lobos travelled from Sector 47 to Babylon 5 on her way to Earth, after spending the last several decades among the Wind Swords.
Sector 420: Officially an empty sector, containing no known colonies, planets or stations. The nearest jump gate on the beacon map is approximately two point five light years from this sector. Unofficially it is the site of a secret Earthforce base used to test and develop Shadow technology.
Sector 500: Region of space near the edge of Drazi Freehold territory. In 2260 Whitestar 1 attacked and captured a Shadow aligned transport carrying a shipment of modified telepaths riding the hyperspace beacon through Sector 500. The Enphili homeworld is located in sector 500 by 9 by 13.
Sector 730: Located about 40 hours, 14 minutes and 18 seconds away from Babylon 5 for a White Star in Hyperspace. Following the end of the First Shadow War, Babylon 4 was abandoned and secretly moved and left to rest as a monument in orbit of a planet in Sector 730 by 12 by 9, where it would be guarded by the Tak'cha for over 900 years.
Sector 800: Region on the edge of Centauri space. In 2260 the Anla'shok sighted Shadow vessels gathering in this sector. They would later drop a long range scanner in the area to get a better idea of what they were up to. In 2262 The Yolugovernment agreed not oppose the independence of the colonies in Sector 800 in exchange for an agreement by the Interstellar Alliance to intercede in all border disputes there for the next twenty years.
Sector 857: Captain Jack Maynard of the EAS Cortez once went on a scouting mission in this sector with his navigation officer, Lieutenant Patrick where they encountered an unknown alien vessel. From the description, it may have been a Shadow vessel.
Eridani Sector: Location of a pre-interstellar Unnamed planet. In 2267 the Excalibur and its crew encounter a pair of paranoid and hostile aliens from the Eridani Sector accusing humans of interfering with their society.