Domain report
ctf.su
ctf.su ranks in the top 0.34% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 62 distinct hosts observed under it.
Connectivity
#454,860harmonic-centrality rank
- Top percentile
- 0.34%
- Hosts observed
- 62
From the Common Crawl cc-main-2026-jul-aug-sep hyperlink graph, 133,241,980 domains total. What this rank means
HTTPS reachability
500HTTP status
https://ctf.su/ answered with HTTP 500.
DNS records
- A
- 109.233.61.5
- AAAA
- No records found.
- MX
- 10 in1-smtp.messagingengine.com.
- 20 in2-smtp.messagingengine.com.
- NS
- dilbert.ns.cloudflare.com.
- nora.ns.cloudflare.com.
Live preview
This is a live, sandboxed embed of ctf.su — not a copy. What it shows can change any time the site itself does.
Domain registration (WHOIS / RDAP)
RDAP lookup failed (HTTP 429).
SSL certificate
Certificate Transparency lookup failed (HTTP 429).
HTTP & security headers
Response
- Server
- cloudflare
- Content-Type
- text/html; charset=UTF-8
- Cache-Control
- no-cache, must-revalidate, max-age=0
- Content-Encoding
- Not sent
Security
- Content-Security-Policy
- Not sent
- Strict-Transport-Security
- Not sent
- X-Frame-Options
- Not sent
- X-Content-Type-Options
- Not sent
- Referrer-Policy
- Not sent
- Permissions-Policy
- Not sent
Redirect chain
- 1.
http://ctf.su/HTTP 302→ http://mslc.ctf.su/
- 2.
http://mslc.ctf.su/HTTP 500
Meta tags
- Title
- Database Error
- Description
- Not set
- Canonical
- Not set
- Robots
- Not set
- Generator
- Not set
- Open Graph title
- Not set
- Open Graph description
- Not set
- Open Graph image
- Not set
- Open Graph type
- Not set
- Twitter card
- Not set
- Twitter title
- Not set
- Twitter image
- Not set
robots.txt
ctf.su has no robots.txt.
Technology detected
Best-effort, based on a small set of well-known signals — this may be incomplete.
- Cloudflarecdn
Server: cloudflare
- PHPother
X-Powered-By: PHP/5.6.40-1~dotdeb+7.1
Related domains
Similar connectivity
Domains ranked just above and below it in the same snapshot.