IP subnet calculator

184.72.253.0-184.73.23.255

184.72.253.0-184.72.253.255
184.72.253.0/24

184.72.254.0-184.72.255.255
184.72.254.0/23

184.73.0.0-184.73.15.255
184.73.0.0/20

184.73.16.0-184.73.23.255
184.73.16.0/21