Subnet Calculator
Calculate subnets, CIDR notation, network addresses, and host ranges. Free online subnet calculator for network engineers. Get instant IP calculations.
How to Calculate Subnets
- 1 Enter an IP address (e.g., 192.168.1.0)
- 2 Select a subnet mask or enter CIDR notation (e.g., /24)
- 3 Click 'Calculate' to process the subnet
- 4 View network address, broadcast address, and host range
- 5 See total hosts, usable hosts, and wildcard mask
Frequently Asked Questions
Is my code or data stored anywhere? ▼
No. All developer tools process data locally in your browser. Nothing is sent to any server or logged.
Can I use these tools offline? ▼
Yes! After the initial page load, most developer tools work without an internet connection.
Are there API limits? ▼
No limits. Since processing happens in your browser, you can use the tools as much as you need.
Is the output compatible with production use? ▼
Yes. Our tools produce standard-compliant output suitable for production environments.
🔒 Instant results, faster than AI. No signup. 100% private.
Last updated: January 15, 2026 · v2.1