online CIDR and IP subnet calculator : Check host

124.126.18.0-124.126.19.255
124.126.18.0/23

124.126.20.0-124.126.23.255
124.126.20.0/22

124.126.24.0-124.126.31.255
124.126.24.0/21

124.126.32.0-124.126.63.255
124.126.32.0/19

124.126.64.0-124.126.127.255
124.126.64.0/18

124.126.128.0-124.126.135.255
124.126.128.0/21

124.126.136.0-124.126.139.255
124.126.136.0/22

IP subnet calculator 124.126.18.0-124.126.139.255