IP subnet calculator

128.68.0.0-128.68.56.255

128.68.0.0-128.68.31.255
128.68.0.0/19

128.68.32.0-128.68.47.255
128.68.32.0/20

128.68.48.0-128.68.55.255
128.68.48.0/21

128.68.56.0-128.68.56.255
128.68.56.0/24