The CIDR Calculator helps you break down Classless Inter-Domain Routing (CIDR) notations like192.168.1.0/24 into clear and useful information. It shows the network address, broadcast address, usable host range, and total host capacity for any subnet.

This tool runs fully in your browser (no data leaves your device), making it fast, secure, and privacy-friendly. Whether you’re a student learning subnetting, a SOC analyst mapping attack surfaces, or a network admin planning IP allocations, it provides a quick way to calculate and understand subnet ranges.

• 🔹 Enter any CIDR notation (e.g., 10.0.0.0/16)
• 🔹 Instantly see network, broadcast, mask, and host counts
• 🔹 Copy, export, or share results for reporting or study