Sector 64238 was a region of space in Grid 11 of the Delta Quadrant.
In 2376, it was one of three sectors where the Starfleet projected the USS Voyager would be traversing.
That year, Lieutenant Reginald Barclay transmitted a message to Sector 64238 through the MIDAS array in an effort to contact Voyager. (VOY: "Pathfinder")