I get ERR_CONNECTION_TIMED_OUT

I get ERR_CONNECTION_TIMED_OUT when I try to connect to any cloudflare based website

When I use another IP, I don’t have it

Hm, maybe it’s due to your ISP or the IP is being “blocked” due to some bad reputation, if so?

Have you tried using a VPN connection maybe, or rather acccessing some Website behind Cloudflare service from mobile phone (network, LTE, EDGE, cellular …)?

Furthermore, does it happen in each Web browser or some specific only?

Have you triued restarting your router, just in case if some local “DNS cache”, but if to any Cloudflare based website, I doubt it would help.

Some other helpul articles regarding ERR_CONNECTION_TIMED_OUT error in a Web browser:
May I ask have you checked the suggestions from the below article?: