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Domain report

opencms.org

opencms.org ranks in the top 0.35% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 11 distinct hosts observed under it.

Explore opencms.org in the Web Graph

Connectivity

#460,126harmonic-centrality rank
Top percentile
0.35%
Hosts observed
11

From the Common Crawl cc-main-2026-jul-aug-sep hyperlink graph, 133,241,980 domains total. What this rank means

HTTPS reachability

200HTTP status

https://opencms.org/ answered with HTTP 200.

DNS records

A
  • 95.217.117.125
AAAA
No records found.
MX
  • 10 mx.opencms.org.
NS
  • ns.udag.net.
  • ns.udag.org.
  • ns.udag.de.

Live preview

Screenshot of opencms.org

This site sends "X-Frame-Options: SAMEORIGIN", which blocks embedding it here.

Since opencms.org can't be embedded live, this is a captured screenshot instead — a snapshot from whenever it was last rendered, not necessarily this exact moment.

Domain registration (WHOIS / RDAP)

RDAP lookup failed (HTTP 429).

How to read WHOIS and RDAP data

SSL certificate

Certificate Transparency lookup failed (HTTP 429).

How to check when a certificate expires

HTTP & security headers

Response

Server
cloudflare
Content-Type
text/html;charset=utf-8
Cache-Control
public, max-age=0
Content-Encoding
Not sent

Security

Content-Security-Policy
frame-ancestors self
Strict-Transport-Security
max-age=63072000; includeSubDomains; preload
X-Frame-Options
SAMEORIGIN
X-Content-Type-Options
nosniff
Referrer-Policy
strict-origin-when-cross-origin
Permissions-Policy
Not sent

What each security header does

Redirect chain

  1. 1.http://opencms.org/HTTP 301

    → https://opencms.org/

  2. 2.https://opencms.org/HTTP 301

    → https://www.opencms.org/

  3. 3.https://www.opencms.org/HTTP 302

    → https://www.opencms.org/en

  4. 4.https://www.opencms.org/enHTTP 200

Meta tags

Title
OpenCms, the user-friendly open source CMS
Description
OpenCms from Alkacon Software is a professional, easy-to-use CMS for managing large websites.
Canonical
https://www.opencms.org/en
Robots
index, follow
Generator
Not set
Open Graph title
OpenCms, the user-friendly open source CMS
Open Graph description
OpenCms from Alkacon Software is a professional, easy-to-use CMS for managing large websites.
Open Graph image
Not set
Open Graph type
Not set
Twitter card
Not set
Twitter title
Not set
Twitter image
Not set

robots.txt

Disallow rules (User-agent: *)
9
Disallow rules (other agents)
0

Sitemap declared:

  • https://www.opencms.org/sitemap.xml

Technology detected

Best-effort, based on a small set of well-known signals — this may be incomplete.

  • Cloudflarecdn

    Server: cloudflare

Related domains

Similar connectivity

Domains ranked just above and below it in the same snapshot.