IP subnet calculator

196.40.61.0-196.40.73.255

196.40.61.0-196.40.61.255
196.40.61.0/24

196.40.62.0-196.40.63.255
196.40.62.0/23

196.40.64.0-196.40.71.255
196.40.64.0/21

196.40.72.0-196.40.73.255
196.40.72.0/23