Answer
$(-3,2,-1),(-3,5,0),(6,2,0),(6,5,0),(6,2,-1),(-3,5,-1).$
Work Step by Step
If the opposite vertices of a rectangular box are: $(a,b,c)$ and $(x,y,z)$ then the other six vertices will have coordinates(because the other $6$ vertices must "inherit" each coordinate from either of the opposite vertices): $(a,b,z),(a,y,c),(x,b,c),(x,y,c),(x,b,z),(a,y,z).$
Hence here the other vertices are: $(-3,2,-1),(-3,5,0),(6,2,0),(6,5,0),(6,2,-1),(-3,5,-1).$
