Data set of top third party web domains with rich metadata about them
JavaScript
1,738
760 commits
updated Oct 9, 2026
This is not a block list, but a data set of the most common third party domains on the web with information about their behavior, classification and ownership. It allows for easy custom solutions with the significant metadata it has for each domain: parent entity, prevalence, use of fingerprinting, cookies, privacy policy, and performance. The data on individual domains can be found in the domains directory.
Read our blog post for more information on the Tracker Radar
To learn more about the Tracker Radar data format, see Data Model
The code used to build the Tracker Radar: Tracker Radar Collector and Tracker Radar Detector
Copyright (c) 2020 Duck Duck Go, Inc.
The Tracker Radar data is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. If you'd like to license the list for commercial use, please reach out.
Questions about the Tracker Radar? See our frequently asked questions
Need help with other DuckDuckGo things? See DuckDuckGo Help Pages.
(top 24 of 27)
1,936 followers · starred Sep 2023
1,131 followers · starred Mar 2023
289 followers · starred Mar 2025
131 followers · starred Apr 2020
Data set of top third party web domains with rich metadata about them
JavaScript
1,738
760 commits
updated Oct 9, 2026
This is not a block list, but a data set of the most common third party domains on the web with information about their behavior, classification and ownership. It allows for easy custom solutions with the significant metadata it has for each domain: parent entity, prevalence, use of fingerprinting, cookies, privacy policy, and performance. The data on individual domains can be found in the domains directory.
Read our blog post for more information on the Tracker Radar
To learn more about the Tracker Radar data format, see Data Model
The code used to build the Tracker Radar: Tracker Radar Collector and Tracker Radar Detector
Copyright (c) 2020 Duck Duck Go, Inc.
The Tracker Radar data is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. If you'd like to license the list for commercial use, please reach out.
Questions about the Tracker Radar? See our frequently asked questions
Need help with other DuckDuckGo things? See DuckDuckGo Help Pages.
(top 24 of 27)
1,936 followers · starred Sep 2023
1,131 followers · starred Mar 2023
289 followers · starred Mar 2025
131 followers · starred Apr 2020
