Subnet Calculator
The Subnet Calculator takes any IPv4 address and CIDR prefix length and returns the network address, broadcast address, usable host range, subnet mask, wildcard mask, and total number of usable hosts. It supports all prefix lengths from /0 to /32 and validates input in real time. Network engineers use this tool daily to plan IP address allocations, verify firewall rules, design VLAN subnets, and troubleshoot connectivity problems. Enter a single address like 192.168.1.0/24 and instantly see every detail you need. The calculator also displays the binary representation of the mask for educational purposes. Whether you are studying for a CCNA exam or segmenting a production network, this tool saves time and eliminates manual binary maths. Runs entirely in your browser with no server-side processing.