IP subnet calculator

111.62.128.0-111.62.157.255

111.62.128.0-111.62.143.255
111.62.128.0/20

111.62.144.0-111.62.151.255
111.62.144.0/21

111.62.152.0-111.62.155.255
111.62.152.0/22

111.62.156.0-111.62.157.255
111.62.156.0/23