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CDN Tools

Content delivery network tools like CDN Finder and CDN Performance Checker.

CDN Finder

Quickly and easily identify all the CDNs a website is using. Or lookup the CDN for a single URL or hostname!

CDN Performance Checker

Instantly check your CDN for timeouts, errors and caching issues from 10 locations around the globe.

EDNS Client Subnet Checker

Does your CDN support EDNS Client Subnet? Find out with a quick EDNS Client Subnet test.

Initcwnd Checker tool

Currently offline

Quickly measure the initial congestion window (initcwnd) of a CDN (or your web server).