Internet Measurement Tests

M-Lab hosts a number of measurement tests, allowing you to check for everything from network speed and latency to blocking and throttling. Explore them below, and run a test to learn more about your connection.

All tests hosted on M-Lab only perform active measurements. This means that tests only run when people decide to run them. They do not passively monitor your connection. M-Lab hosted tests do not download or upload files to or from your device. Instead tests measure the way in which the network responds to a synthetic stream of data that is generated by the individual test specifically for the purpose of measurement. The tests do not collect information about your other Internet traffic, such as your emails or web searches, or any personally identifiable information. For more information, see our privacy policy.

  • All data collected will be made publicly available, including IP addresses.
  • All tests are open source and created by researchers.


Transparency tests provide insight into network management practices, such as application-specific blocking, throttling, traffic shaping, and other practices that determine your ability to use some applications or to access some content on the Internet.

Network State

Tests in this section provide information on the state of the network you are connected to and the details of the network environment. For example, tests could check to see if IPv6 is enabled, or collect traceroute data or other information about the network that can provide context for other measurements, such as upload or download speed.
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