Your public IP address is the network address this browser exposes to websites right now. It usually identifies your current internet connection, not the exact device in your hand. The city and ISP are approximate and can change when you switch networks, use mobile data, reconnect a VPN, or move behind a corporate gateway.
uname.fyi asks ipwho.is directly from your browser and displays the result here. The request is not proxied through this site, and the page does not store, log, or remember the response. If the lookup is unavailable, the value falls back cleanly instead of blocking the rest of the page.