What is 1.1.1.1?
1.1.1.1 is the primary IP address of Cloudflare's public DNS resolver, launched on April 1, 2018. Cloudflare claims it is the fastest public DNS resolver in the world, with a focus on user privacy. Unlike Google DNS, Cloudflare states it does not use DNS query data to serve advertisements and promises to wipe all logs within 24 hours.
Privacy note
1.1.1.1 appearing in a DNS leak test means your DNS is going through Cloudflare's infrastructure. This is common when using Cloudflare's 1.1.1.1 app, WARP, or when your router is configured to use it. If your VPN is not overriding DNS, this resolver may still be visible.