mask:「225」.255.224.0
是不是打錯咧??

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Host Address Range
140.11.32.1 - 140.11.63.254

Subnet ID
140.11.32.0

Broadcast Address
140.11.63.255

Maximum Subnets
8

Hosts per Subnet
8190


http://www.subnet-calculator.com/subnet.php?net_class=B