How much of your latency is physics, and how much is your route?
Cloud providers publish a city or an area for each region, not a building. The coordinate used here is the centre of that place, so the floor below is a floor for the CITY and not for the building. INFERRED
Ashburn, Virginia to Mumbai is 12855 kmCOMPUTED12855 km, COMPUTED. Haversine great circle distance on a sphere of radius 6371.0088 km, the IUGG mean Earth radius, between the two coordinates shown.. Light in glass cannot make that round trip in under 126 msCOMPUTED126 ms, COMPUTED. Twice the great circle distance, divided by the speed of light in fibre. A cable is a line on a sphere and the great circle is the shortest such line, so no cable can beat this round trip number. It is a lower bound, not a prediction.. Nothing you build can beat that number.
This makes 8 small HTTPS requests to each of 12 public cloud endpoints, plus 1 request to Cloudflare to learn which facility served you: 97 requests in total, to the hosts listed below. The first response from each endpoint is thrown away to open the connection, so 1 of the 8 is never part of any figure you see. Nothing is uploaded. Nothing is stored. COMPUTED
No account, no key, no cookie, no analytics and no upload. Each request is timed and its response is thrown away. The list below is every host this page is able to reach, and the browser is told to refuse anything else.
Nothing on this page has touched the network.
Which city are you nearest? This page does not look you up and never will, so it needs you to say. Your answer stays in this browser and is never sent anywhere.
Cloud providers publish a city or an area for each region, not a building. The coordinate used here is the centre of that place, so the floor below is a floor for the CITY and not for the building. The same is true of the point you pick here: it is a city centre, so every floor below is a floor for that city and not for your desk.
That is a floor and not a prediction. It is what the shortest possible line between those two places costs in glass, so nothing built on either end can beat it. What it cannot tell you is how much worse your own connection will be, because at this point it has not measured you and it has not looked you up.