the 1 isometry classes of irreducible [18,9,6]_2 codes are:

code no       1:
================
1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0
1 1 1 1 1 0 0 0 0 0 1 0 0 0 0 0 0 0
1 1 1 0 0 1 1 0 0 0 0 1 0 0 0 0 0 0
1 1 0 1 0 1 0 1 0 0 0 0 1 0 0 0 0 0
1 0 1 0 1 0 1 1 0 0 0 0 0 1 0 0 0 0
1 0 1 1 0 1 0 0 1 0 0 0 0 0 1 0 0 0
1 0 0 1 1 0 1 0 1 0 0 0 0 0 0 1 0 0
1 0 0 0 1 1 0 1 1 0 0 0 0 0 0 0 1 0
1 1 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 1
the automorphism group has order 2448
and is strongly generated by the following 5 elements:
(
1 0 0 0 0 0 0 0 0 
0 1 0 0 0 0 0 0 0 
1 0 0 0 1 1 0 1 1 
1 0 1 0 1 0 1 1 0 
0 0 0 0 0 0 0 0 1 
1 0 1 1 0 1 0 0 1 
1 1 1 1 1 0 0 0 0 
0 0 1 0 0 0 0 0 0 
0 0 0 1 0 0 0 0 0 
, 
1 0 0 0 0 0 0 0 0 
1 1 1 0 0 1 1 0 0 
1 1 1 1 1 1 1 1 1 
1 1 0 1 0 1 0 1 0 
1 1 1 1 1 0 0 0 0 
0 0 0 1 0 0 0 0 0 
1 0 0 0 1 1 0 1 1 
0 0 0 0 1 0 0 0 0 
0 0 1 0 0 0 0 0 0 
, 
1 0 0 0 0 0 0 0 0 
0 0 0 0 1 0 0 0 0 
1 0 0 0 1 1 0 1 1 
1 1 1 1 1 0 0 0 0 
1 1 1 1 1 1 1 1 1 
0 0 1 0 0 0 0 0 0 
1 1 1 0 0 1 1 0 0 
0 0 0 1 0 0 0 0 0 
1 1 0 1 0 1 0 1 0 
, 
1 1 1 1 1 0 0 0 0 
0 0 0 0 0 0 0 1 0 
0 0 0 0 0 0 1 0 0 
0 0 0 0 0 1 0 0 0 
0 0 0 0 0 0 0 0 1 
1 1 0 1 0 1 0 1 0 
1 0 0 1 1 0 1 0 1 
0 0 1 0 0 0 0 0 0 
1 0 0 0 0 0 0 0 0 
, 
1 1 0 0 0 0 1 1 1 
0 0 0 0 0 0 0 1 0 
1 0 0 0 1 1 0 1 1 
0 0 0 0 0 0 1 0 0 
1 0 1 0 1 0 1 1 0 
0 0 0 0 0 0 0 0 1 
1 0 0 1 1 0 1 0 1 
1 0 0 0 0 0 0 0 0 
1 1 1 1 1 0 0 0 0 
)
acting on the columns of the generator matrix as follows (in order):
(3, 8, 12, 11, 7, 15, 6, 17)(4, 9, 5, 18, 16, 10, 13, 14), 
(2, 17, 7, 14, 13, 4, 6, 12)(3, 9, 16, 15, 11, 5, 8, 10), 
(2, 13, 9, 15, 16, 17, 3, 6, 14, 18, 12, 7, 11, 4, 8, 10, 5), 
(1, 9, 5, 13, 6, 4, 10, 11)(2, 14, 15, 12, 16, 7, 3, 8), 
(1, 8, 2, 13, 12, 11, 9, 6, 10, 14, 5, 16, 7, 4, 17, 3, 18)
orbits: { 1, 11, 18, 12, 15, 7, 10, 5, 14, 3, 8, 6, 13, 16, 9, 17, 4, 2 }