Networking & IT ToolsPrivate by design
Subnet Calculator
Enter an IP address and CIDR prefix to calculate the network address, broadcast address, usable host range, and host count.
How to use this tool
- 1Enter an IPv4 address.
- 2Set the CIDR prefix length.
- 3See the full subnet breakdown.
Frequently asked questions
What's the difference between network and broadcast address?+
The network address identifies the subnet itself (all host bits zero); the broadcast address targets every host on the subnet (all host bits one) — neither is usually assignable to a device.
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