NDT (Network Diagnostic Tool) Dataset
Raw Datasets 2009 – present
About this dataset
The NDT dataset contains measurements of TCP throughput and latency collected by the Network Diagnostic Tool (NDT). NDT is a single-stream performance measurement of a connection's capacity for bulk transport. Measurements include download speed, upload speed, round-trip time (RTT), and packet loss between end-user devices and M-Lab servers worldwide.
Access the data
BigQuery
BigQuery (ndt7)
Parsed ndt7 summary table — recommended for most analyses
BigQuery
BigQuery (ndt5)
Parsed ndt5 summary table — historical data pre-2020
JSON / raw TCP trace
Google Cloud Storage (raw)
Raw measurement archives in compressed JSON and pcap format
gs://archive.measurementlab.net/ndt/ Interactive
Viz — Throughput Explorer
Interactive visualization of NDT download and upload speeds by geography and ISP
Dataset info
- Geography
- Global
- Updated
- Continuous
- Approximate size
- ~2 TB/year (raw), ~500 GB/year (parsed)
- Publisher
- Measurement Lab
- License
- CC0 1.0 Universal
- Source test
- ndt