Learn to Subnet - an easy method with no binary conversions

213.152.128.0/18
1 network with 4094 usable addresses:
1 network with 4094 usable addresses:
1 network with 1022 usable addresses:
1 network with 254 usable addresses:
1 network with 254 usable addresses:
1 network with 30 usable addresses:

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