Click "New Problem" to start practice

		Problem IPv4 address for your Calculation :	. . . /

or type your preferred IPv4 address and Prefix Length to let us calculate for you.

		Your Preferred IPv4 address :	. . . /

Please type the answers from your calculation in each blank as the follow requirement.
Click "Check" to check your answer, or click "Show" to let us show you the correct answer.

	Subnet Mask/IPv4 address	Check/Show	Answer	Correct/Incorrect
Subnet Mask	. . .		. . .
Network ID	. . .		. . .
First Host IP	. . .		. . .
Last Host IP	. . .		. . .
Broadcast IP	. . .		. . .
Wildcard Mask for this IP set	. . .		. . .
Check/Show all :

You can study the technique from our article from <<Click This!>>

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