What it calculates
The server validates the hostname and record type, then queries Cloudflare's public DNS-over-HTTPS JSON endpoint. It never fetches a URL supplied by the user.
Working now Starter lab / NET
Forefront Edge
Lab
Resolve a public hostname through a fixed DNS-over-HTTPS upstream and inspect the returned records and TTLs.
Working starter tool / v0.1
DNS resolver
Resolve a public hostname through a fixed DNS-over-HTTPS upstream and inspect the returned records and TTLs.
What it does not prove
This is a diagnostic lookup, not a full propagation test. Results reflect one public resolver and may differ by location, cache state or DNS provider.
Build on the mission
Use it, inspect it, prepare the next build.
Independent starter tool. This lab is functional software, but it is intentionally narrow and does not claim to complete the full Edge Observatory roadmap. No indiscriminate scanning. Targets must be owned, approved or explicitly public test infrastructure.