Cloudflare Radar: New TLD Insights and Certificate Transparency

Cloudflare

Nov 1, 2025

#ThisWeekinNET — Episode 109, part 2
In this second part of episode #109, host João Tomé talks with André Jesus, Systems Engineer at Cloudflare and front-end engineer on the Radar team. They discuss the latest updates to Cloudflare Radar, the platform that turns Internet data into accessible insights.

André, who joined Cloudflare as an intern in Lisbon, Portugal, in 2024, explains how radar.cloudflare.com showcases trends in Internet traffic, protocol adoption, and security. He walks us through Radar’s new Top-Level Domain (TLD) insights, how the team uses DNS magnitude to measure domain popularity, and why certificate transparency is crucial for a safer web.

The conversation also goes into outage monitoring, the Data Explorer and URL scanner tools, and how users around the world are finding surprising Internet trends — like the rise of Linux usage in France.

Learn more in the blog series: https://blog.cloudflare.com/tag/research/

Part 1 of episode 109 here: https://www.youtube.com/watch

⸻

⏱️ Timestamps

01:04 – Guest intro: André Jesus on joining Cloudflare and the Radar team

02:22 – What Cloudflare Radar is and what it shows

03:16 – New blog launch: Top-Level Domain Insights

04:45 – The new TLD ranking and DNS magnitude metric

06:23 – Exploring domain and security data with Radar

08:42 – Why certificate transparency matters for Internet trust

10:31 – Monitoring outages and Internet disruptions

12:11 – Some Radar sections: certificate transparency, Internet quality, URL scanner