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IP Address Tools

Map IPv4 to IPv6 and back, and calculate subnet details from CIDR notation.

Mode

How it works

Subnets: the prefix length sets the mask; network, broadcast and usable host range follow from it.

Questions

How does the IP address tools work?
Subnets: the prefix length sets the mask; network, broadcast and usable host range follow from it.
Is my text sent to a server?
No. The tool runs entirely in your browser; nothing you type is uploaded.

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