IP subnet calculator

212.117.160.0-212.117.189.255

212.117.160.0-212.117.175.255
212.117.160.0/20

212.117.176.0-212.117.183.255
212.117.176.0/21

212.117.184.0-212.117.187.255
212.117.184.0/22

212.117.188.0-212.117.189.255
212.117.188.0/23