Tools
Subnet calculator
What it does: offline CIDR/VLSM math — network, broadcast, usable host range, mask, and class.
Safe to run: yes, and fully offline.
Reading results: enter 192.168.1.0/24 (or an IP + mask) to get the boundaries of the subnet.
This page mirrors the in-app help. Open the same article any time from the app's Docs panel. Spot something unclear? Tell us.