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CIDR Calculator

Colorful, responsive IPv4 & IPv6 subnet calculator with live prefix sizing.

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Input

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IP Version

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Prefix Length

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Addresses in Prefix

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Range

Prefix Range

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Subnet Mask

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Wildcard Mask

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Usable Hosts

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Broadcast

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Network Address

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First Usable

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Last Usable

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Note

IPv6 has no broadcast. Results show prefix start and end.

Addresses (exact/≤2^64)

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Addresses (power form)

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Canonical Input

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