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A comment on I made a simple geolocation service. Parent comment

Re:I made a simple geolocation service by maple3142 on Friday July 24, 2020 @09:23AM (#23939142)
It is worth mentioning that /cdn-cgi/trace doesn't only work under www.cloudflare.com. It works for any https?://DOMAIN_WITH_CLOUDFLARE/cdn-cgi/trace . It is an easy to determine whether a website is using CloudFlare or not too.
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