Internet Atlas

Helping decision makers anticipate and address structural risks to the global Internet through measurements, visualizations and analysis

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Curious about what countries are blocking websites and at what volume? When countries block websites, they usually block websites based in the United States. See an interactive visualization here. Click on a country to see whose websites it blocks (outgoing) and who blocks its websites (incoming). View all of our source code here

The internet is central to the lives of most people, but there is little public awareness of the infrastructure that powers the internet. Here at the UC Berkeley’s Internet Atlas Project we work to make that infrastructure better understood: to define its strengths and weaknesses so as to yield actionable insights for a more stable and secure internet, and to expand who has access and can benefit from the upsides of the digital information revolution.

Original IA measurement tools:

Click to stay informed of the latest Internet Atlas updates

Read more by Nick Merrill on the Internet Atlas:

Internet Atlas in the News:

Two obscure service providers briefly broke the internet. It could happen again.

Show me who bans TikTok and I’ll show you your (future) allies.

Protect and regulate the internet’s hidden power brokers.

Facebook goes down: What happened, and what happens next.

Cyberspace, the 21st century battleground.

Understanding the ‘splinternet’ and online security.


  • See a map or a force-directed graph of similarity between countries’ patterns of website blocking
  • See a visualization of network interference globally
  • Access this project’s code, data, and analysis on Github

Watch videos about this project:


CLTC invites individual, foundation and industry collaborators and supporters to contact Nick Merrill or Shanti Corrigan to discuss opportunities to advance the Internet Atlas project.  We thank the following for early support to launch this concept:

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