online CIDR and IP subnet calculator : Check host

188.128.57.138-188.128.57.139
188.128.57.138/31

188.128.57.140-188.128.57.143
188.128.57.140/30

188.128.57.144-188.128.57.159
188.128.57.144/28

188.128.57.160-188.128.57.191
188.128.57.160/27

188.128.57.192-188.128.57.255
188.128.57.192/26

188.128.58.0-188.128.59.255
188.128.58.0/23

188.128.60.0-188.128.63.255
188.128.60.0/22

188.128.64.0-188.128.71.255
188.128.64.0/21

188.128.72.0-188.128.75.255
188.128.72.0/22

IP subnet calculator 188.128.57.138-188.128.75.255