Subnet Calculator
Compute CIDR notation, netmask, broadcast address, and usable host range.
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Input an IP address and prefix length; get all derived network information.
Supports both IPv4 and IPv6 networks.
- Plan subnets for network segmentation.
- Derive netmask and broadcast address from CIDR.
- Check usable host count for a given subnet.
How it works
- Enter an IP address and CIDR prefix (e.g., 192.168.1.0/24).
- Tool calculates network, netmask, broadcast, and host ranges.
- Results display host count and first/last usable addresses.
Related tools
Example
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Output