Windows: Press `Windows + R`, type `cmd`, press Enter; type `ipconfig` and press Enter; look for “IPv4 Address”
macOS: Open Terminal; type `ifconfig` and press Enter; look for `inet` under your active interface (e.g., `en0`/`en1`)
Linux: Open Terminal; type `ip addr` and press Enter; look for `inet` under your active interface
Android: Settings → Network & Internet (or Connections) → Wi‑Fi → select your network → look for “IP address”
iPhone/iPad: Settings → Wi‑Fi → tap your connected network → look for “IP Address”
Router (local IP): Check the router’s “Connected devices” list or “DHCP clients” page
Public IP: Search “what is my ip” in a browser, or visit `https://api.ipify.org`