Online IPv4 CIDR calculator: input IP/prefix (e.g., 192.168.1.0/24) to calculate network address, broadcast address, subnet mask, host range, and total hosts. Essential for network engineers.
TL;DR: Free online IPv4 CIDR subnet calculator. Input IP and prefix to compute network address, broadcast, subnet mask, host range, and available hosts. Runs locally in browser.
This tool runs entirely in your browser. Open DevTools → Network panel and search your input — it appears in no request.
FAQ
Completely free, no registration required. Calculate IPv4 subnet information directly in your browser — all operations run locally with no usage limits.
After entering IP/prefix (e.g., 192.168.1.0/24), it automatically calculates network address, broadcast address, subnet mask, host range, and available host count — an essential tool for network engineers.
The current version supports IPv4 CIDR calculation. IPv6 support will be added in future versions.
No. All CIDR calculations run locally in your browser. IP addresses are never sent to any server.