"Preferred IP" Test Cloudflare CDN latency and speed, get the fastest IP (IPv4 / IPv6)! In addition, other CDN / website IPs are also supported. Many foreign websites are using Cloudflare CDN, but the IPs assigned to visitors from mainland China are not friendly (high latency, high packet loss, and slow speed). Although Cloudflare discloses all IP segments , it would be exhausting to find the one that suits you among so many IPs, so this software came into existence. After the speed measurement...