104.21.0.0-104.21.127.255
104.21.0.0/17
104.20.0.0-104.20.255.255
104.20.0.0/16
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IP subnet calculator 104.20.0.0-104.21.127.255
104.21.0.0-104.21.127.255
104.21.0.0/17
104.20.0.0-104.20.255.255
104.20.0.0/16