New
Help inform the future of Cloudflare Radar by taking part in a short survey
AS209
- Name
- CENTURYLINK-US-LEGACY-QWEST
- AKA
- Lumen AS209
- Country
- US
- Website
- http://www.lumen.com
Security & Attacks
Insight into network and application layer attack traffic
Layer 3/4 Attacks
DDoS Attack TypeLearn more...
Layer 7 Attacks
Top Mitigation Techniques
Adoption & Usage
Insight into adoption and usage of key protocols
Internet Protocol versions
IPv4 vs. IPv6Learn more...
HTTP versions
HTTP/1.x vs. HTTP/2 vs. HTTP/3Learn more...
Mobile vs. Desktop
Mobile device vs. desktop traffic distributionLearn more...
Bot vs. Human
Bot (automated) vs. human traffic distributionLearn more...
Top Browsers & User Agents
Distribution of requests to Cloudflare by user agentLearn more...
BGP Announcements
BGP announcement volume over the selected time rangeLearn more...
BGP Route LeaksBeta
Recent BGP route leaks originated by or affecting AS209Learn more...
Latest BGP blog posts blog.cloudflare.com
Latest BGP posts from the Cloudflare blog
Helping build a safer Internet by measuring BGP RPKI Route Origin Validation
Is BGP safe yet? If the question needs asking, then it isn't. But how far the Internet is from this goal is what we set out to answer.
Carlos Rodrigues
Why BGP communities are better than AS-path prepends
Routing on the Internet follows a few basic principles. Unfortunately not everything on the Internet is created equal, and prepending can do more harm than good. In this blog post we’ll talk about the problems that prepending aims to solve, and some alternative solutions
Tom Strickx
How we detect route leaks and our new Cloudflare Radar route leak service
In this blog post, we will introduce our new system designed to detect route leaks and its integration on Cloudflare Radar and its public API.
Mingwei Zhang