Unsigned builds. Windows builds are not code-signed until SignPath Foundation approves the project, and macOS builds are not notarised, so both systems warn on first start.
Platforms. Windows x86_64, macOS 12+ (Apple silicon and Intel) and Linux x86_64. No Windows on ARM or Linux ARM builds yet.
IP database placements are hints. The fallback database places a backbone address where its operator registered the prefix, which can be a head office far from the router. Route Map rejects placements the round trip rules out, but a wrong city that is still within reach is shown, labelled ip-db. Some addresses are known only to a country (hollow marker).
The physics bound is an upper limit. It proves a hop cannot be farther than about 100 km per millisecond of round trip; it cannot prove a hop is where a source says. Slow replies (routers answer ICMP at low priority) only loosen the bound, never tighten it.
What traceroute cannot see. MPLS tunnels hide hops, the return path can differ from the forward path, and hops that do not answer are listed but not placed.
Origin from your public IP is a city-level guess and is wrong behind a VPN or proxy; set the origin in Settings.
Repeated hops at one place. Hops at the same place that are not next to each other in the trace get separate markers; at world zoom the labels can spread far apart, with thin leader lines back to the real point. Zoom in to see them together.
Hostname rules cover the operators Hoiho and the bundled site-code table know. A carrier with an unknown naming scheme falls back to the database; reports of such schemes are welcome.
