IP Subnet Calculator
A CIDR prefix determines which leading bits identify the network; the remaining bits identify addresses.
This calculator is free to use. Enable JavaScript to enter your values and see a result instantly.
How it works
A CIDR prefix determines which leading bits identify the network; the remaining bits identify addresses.
Worked example
192.168.1.10/24 belongs to network 192.168.1.0/24.
Keep in mind
Usable host counts depend on subnet conventions.