Subnet Calculator
Calculate subnet details from CIDR notation — network, broadcast, host range, and more
How to use Subnet Calculator
Enter an IP address with CIDR notation (e.g., 192.168.1.0/24) and click Calculate. Use the quick CIDR buttons to change the subnet mask while keeping the IP address.
Why calculate subnets locally?
Network configuration details are sensitive infrastructure information. Devault computes everything in your browser — no data transmitted to any server.