Sector 25 was an area of space defined by the World Space Patrol.
In January 2065, Lieutenant Ninety detected an automatic mayday coming from Area 4 of Sector 25, being told by Commander Zero to alert Fireball XL5 and get Steve Zodiac to investigate. It transpired that the signal had originated from a space freighter which had been hijacked by Batmen, who proceeded to attack Steve and flee the scene in the freighter. Later, when Steve contacted Space City for an update on the freighter's location, it had moved to the edge of Sector 25, nearly in hyperspace. By the time Fireball caught up, the freighter had moved again, making a landing on an asteroid in hyperspace. (COMIC: The Batmen)
Behind the scenes
In the television series Fireball XL5, the eponymous ship usually patrolled Sector 25.