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CIDR Calculator

CIDR Calculator

Find the network, broadcast, mask, and usable range for an IPv4 CIDR block.

Tool

Input

Output

Output appears here.

Your data stays in this browser and is not uploaded.

How it works

1
Enter an address and prefix, such as 192.168.1.0/24.
2
Read the network, mask, and usable range.
3
A bare subnet mask tells you which prefix it is.

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Questions

Does this support IPv6?

No. This calculator is IPv4 only.