EDNS Resolver Probe

Which DNS resolver actually answered for you — and, when it discloses it, which network you are really on.

How it reads. Each query resolves a single-use hostname, so the authoritative server can name the resolver that asked. dns is that resolver — anycast makes its country unreliable on its own. edns is the EDNS Client Subnet the resolver forwarded: that one names your real network. A Swiss resolver disclosing a French subnet is a leak; a Swiss resolver with no ECS is simply unknown, and this probe says so rather than guessing.