| CIDR | Subnet Mask | Wildcard | Total IPs | Usable Hosts |
|---|
Enter an IP address with CIDR notation (like 192.168.1.0/24) or type an IP in the first field and a subnet mask in the second (like 255.255.255.0 or /24). Click Calculate to see the full breakdown including network address, broadcast address, usable host range, wildcard mask, and binary representation.
This subnet calculator helps network engineers, sysadmins, and students quickly determine subnet boundaries, host ranges, and addressing details for IPv4 networks. All calculations run entirely in your browser — no data is sent to any server. Use it for network planning, troubleshooting, studying for CCNA/CompTIA, or any IP addressing task.