Content delivery network tools like CDN Finder and Initcwnd Checker.
Quickly and easily look up the names of all CDNs a website is using. Or do a single URL or hostname lookup!
Quickly measure the initial congestion window (initcwnd) of a CDN (or your web server).
Instantly check your CDN's performance from 10 locations around the globe. Test from people's homes, not datacenters!