IP subnet calculator

202.233.18.0-202.233.63.255

202.233.18.0-202.233.19.255
202.233.18.0/23

202.233.20.0-202.233.23.255
202.233.20.0/22

202.233.24.0-202.233.31.255
202.233.24.0/21

202.233.32.0-202.233.63.255
202.233.32.0/19