IPv4 Subnet Calculator
Calculate network, mask, broadcast and host range from an IPv4 address and CIDR prefix.
How to use this tool
- Enter your values in the labelled fields.
- Choose the direction or options, then select Run tool.
- Review the result and copy it when ready.
/31 uses the point-to-point convention; /32 is a single-host route. A broadcast field on those routes is not a recommendation to send broadcast traffic.
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