Measurement Lab

Measure the Internet, save the data, and make it universally accessible and useful.

A Hands-On Tutorial with Reverse Traceroute

Internet paths are often asymmetric: packets from A to B usually take a different route than packets in the reverse direction from B to A. This post walks through a reproducible case study using Reverse Traceroute (RevTr) to compare forward and reverse paths for NDT speed tests.

Open Measurement Hackathon at the ACM Internet Measurement Conference (IMC) 2025

M-Lab, OONI, IIJ, Dioptra Research Group, Cloudflare Radar, Reverse Traceroute, and IODA hosted the Open Measurement Hackathon, October 31, 2025, following the ACM Internet Measurement Conference (IMC) 2025 in Madison, Wisconsin, USA.

OMG! Summary of the 3rd Open Measurement Gathering (OMG) Ask Me Anything (AMA) event

On June 25, 2025, the Open Measurement Gathering (OMG) held a public event, “Open Measurement Gathering AMA”, featuring Censored Planet, IODA, OONI, and Measurement Lab.

Run an NDT Test

M-Lab provides the largest collection of open Internet performance data on the planet. As a consortium of research, industry, and public-interest partners, M-Lab is dedicated to providing an ecosystem for the open, verifiable measurement of global network performance. Real science requires verifiable processes, and M-Lab welcomes scientific collaboration and scrutiny. This is why all of the data collected by M-Lab’s global measurement platform are made openly available, and all of the measurement tools hosted by M-Lab are open source. Anyone with time and skill can review and improve the underlying methodologies and assumptions on which M-Lab’s platform, tools, and data rely. Transparency and review are key to good science, and good science is key to good measurement.

Measurement Lab is led by teams based at Code for Science & Society; Google, Inc; and supported by partners around the world.

Learn more about M-Lab. Get Involved.

Measurement Lab

Measure the Internet, save the data, and make it universally accessible and useful.