Subnet Calculator
Find the subnet mask, network, broadcast address, usable range and host capacity.
⚡ Free
◈ Local-first
✓ No account
Result
Your result will appear here…
Subnet Calculator
Enter an IPv4 address and a CIDR prefix from 0 to 32. The calculation runs locally in your browser.
Free
Core utility with no mandatory account.
Local-first
Browser processing whenever technically possible.
NuvaTools
Focused interface without unnecessary friction.