IP subnet calculator

72.185.96.0-72.185.141.255

72.185.96.0-72.185.127.255
72.185.96.0/19

72.185.128.0-72.185.135.255
72.185.128.0/21

72.185.136.0-72.185.139.255
72.185.136.0/22

72.185.140.0-72.185.141.255
72.185.140.0/23