Checked it from three countries just now — it’s not you, and it’s not gone. 
The exact cause: Cloudflare error 522
Cloudflare answers instantly, then waits for TutFlix’s own server and gets nothing back. Their machine behind the proxy is dead.
DNS resolves fine — still on Cloudflare’s nameservers, unchanged
Domain is healthy at the registrar — paid until 27 Oct 2026, carrying only routine anti-hijack locks
Third-party scans logged the same 522 on 18 Aug — days, not minutes
tutflix.cothrows 526 (broken SSL at their origin) and has since early July — their infrastructure has been dying piece by piece
So what actually killed it
Most likely — the host pulled the plug. It’s a course-piracy site, so abuse and DMCA complaints land on whoever rents them the server. Cloudflare never takes these sites down; they forward the complaints and the host suspends the box. A suspended box answers nothing, and nothing is exactly what we’re getting. 522.
Also fits — the operator walked away. .co broke in July, .org in August, and traffic was already down ~33% month-on-month before either. That reads like someone letting the lights go out one by one.
Ruled out — a domain seizure. When Udemy-style pressure goes through a registrar it shows as clientHold / serverHold, and the domain disappears from DNS entirely. This one still resolves, still points at their own Cloudflare account, still paid until October. The pressure hit the server, never the name. 
Can it come back? A suspended box has a standard next move: rent a new one at a DMCA-ignored “bulletproof” host, restore the backup, repoint Cloudflare, and the site reappears on the same domain. That domain being paid through October keeps the door open. Nobody can promise it. 
📟 Decode any dead site yourself — the codes and the 60-second toolkit
The code names the problem. Learn this table and you never have to ask again:
| What you see | What’s actually happening |
|---|---|
| 522 | their server isn’t answering ← TutFlix right now |
| 521 | their server refused the connection (switched off) |
| 523 | their origin is unreachable — routing or DNS broken on their side |
| 525 / 526 | their SSL certificate is broken |
| 1020 | you got blocked by their firewall rule |
| 1015 | you got rate-limited — wait it out |
| 403 | blocked: your country, your VPN, or a datacenter IP |
| 451 | removed for legal reasons |
| 503 | overloaded or in maintenance |
| NXDOMAIN / no address | domain expired, dropped, or seized |
| spins forever, no error page | your ISP or country is blocking it |
The 60-second check — nothing to install:
- check-host.net — hits the site from ~20 countries at once. Same error everywhere = the site is down. Only your region failing = your ISP.
- dnschecker.org — DNS answers worldwide. Blank = the domain itself is the problem.
- who.is — expiry date and status.
clientHold/serverHold= suspended or seized. - OONI Explorer — real measurements of what your country actually censors.
- Wayback Machine — read the last working version of the page anyway.
- Cloudflare’s own code list — every number decoded by the people who send them.
The mistake almost everyone makes: checking from a VPS or VPN gives a false 403 — Cloudflare blocks datacenter IPs on sight. My Finland box showed 403 while home connections showed the real 522. Trust the residential result.
For the courses in the meantime
@SRZ’s 135 Warez Sites, Trackers and Indexers — All Live carries course vaults and Udemy sources, each with a pulse shown before you knock. A few of those doors open onto more than TutFlix ever held. 
!