Datacenter Network & Live Speed Test
Verify real-time latency, test download bandwidth, and explore our European and US carrier-grade infrastructure.
Real-Time Latency
Your browser times several round trips to the server this page came from, in Falkenstein, Germany. Every number here is measured on your connection.
We also deploy servers in Nuremberg, Germany and Ashburn, Virginia, USA. Our data centres lists what each one offers.
What your latency number is made of
A reading is the sum of five stages between your screen and our server. Only one of them depends on where the server is, and that is the one no provider can shorten.
- Your device and its radioWi-Fi or mobile signal, a busy browser tab or a battery saver can add delay before a packet even leaves.
- Your internet providerThe last mile and your provider's own network. Congestion at busy hours shows up here.
- Distance through long-haul fibreLight in glass covers about one kilometre every five microseconds, so a longer route always costs more time. This is the floor.
- The data centre networkThe edge where the carrier network meets the servers, including DDoS filtering. See the data centres page for the facilities.
- The server itselfYour browser times a full request, so the time the server needs to answer is included, however small.
Bandwidth Download Files
Test real-world throughput directly to your workstation or office network.
Quick throughput check for standard broadband connections.
Ideal test for 4G/5G mobile and high-speed fiber links.
Heavy stress test for enterprise gigabit connections.
Each test downloads random data from our Falkenstein server and stops after 15 seconds, so a slow line never waits long.
The arithmetic behind the readings
Four figures that let you judge any result on this page. None is a promise about your line; each is physics or arithmetic.
- Time light needs to cross one kilometre of optical fibre, about two thirds of its speed in a vacuum.
- 5 µs per km
- Straight-line distance from Cairo to Falkenstein, worked out from the two cities' coordinates. Real cable routes are longer.
- 2,700 km
- The round-trip floor over that distance: twice the distance at the speed above, before any equipment adds its share.
- 27 ms
- In every byte. A file of 100 MB is 800 megabits, so a 100 Mbps line needs at least 8 seconds for it.
- 8 bits
Basis: fibre delay per kilometre from Dissecting Latency in the Internet's Fiber Infrastructure (arXiv), which puts the speed of light in fibre at about two thirds of its vacuum value; the distance and the other two figures are our own arithmetic on it.
Fast from where your customers are
Measured on the server itself, a page's first byte leaves in under 20 ms; the rest is the distance to you. Pick a plan and your site sits on the same servers.