50.28.15.4-50.28.15.7 50.28.15.4/30
50.28.15.8-50.28.15.15 50.28.15.8/29
50.28.15.16-50.28.15.23 50.28.15.16/29
50.28.15.24-50.28.15.27 50.28.15.24/30
50.28.15.28-50.28.15.29 50.28.15.28/31