17.253.126.0-17.253.127.255 17.253.126.0/23
17.253.128.0-17.253.143.255 17.253.128.0/20
17.253.144.0-17.253.151.255 17.253.144.0/21
17.253.152.0-17.253.155.255 17.253.152.0/22