📌 What is this IP calculator?

This free online tool performs subnet calculations for IPv4 addresses. Given an IP address and a subnet mask (CIDR or dotted decimal), it instantly computes the network address, broadcast address, usable host range, total number of hosts, and wildcard mask. Essential for network engineers, students, and sysadmins.

⚡ How to use it

• 1. Enter IP – e.g., 192.168.1.0.
• 2. Enter subnet mask – as CIDR (e.g., /24) or dotted decimal (e.g., 255.255.255.0).
• 3. Click “Calculate” – results appear instantly.
• 4. Copy any value with the 📋 buttons.

🔥 Why use it?

• ⚡ Instant & accurate – pure JavaScript bitwise operations.
• 🔒 100% private – all calculations happen locally; no data leaves your device.
• 🌐 Works offline – no external dependencies.
• 📋 One‑click copy for every result.