online CIDR and IP subnet calculator : Check host

151.11.54.0-151.11.55.255
151.11.54.0/23

151.11.56.0-151.11.63.255
151.11.56.0/21

151.11.64.0-151.11.127.255
151.11.64.0/18

151.11.128.0-151.11.255.255
151.11.128.0/17

151.12.0.0-151.15.255.255
151.12.0.0/14

151.16.0.0-151.31.255.255
151.16.0.0/12

151.32.0.0-151.63.255.255
151.32.0.0/11

151.64.0.0-151.79.255.255
151.64.0.0/12

IP subnet calculator 151.11.54.0-151.79.255.255