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Domain report

sdk.org

sdk.org ranks in the top 1.90% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 8 distinct hosts observed under it.

Explore sdk.org in the Web Graph

Connectivity

#2,531,761harmonic-centrality rank
Top percentile
1.90%
Hosts observed
8

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://sdk.org/ answered with HTTP 200.

Certificate until 2026-12-12C=US, O=Let's Encrypt, CN=YR2

DNS records

A
  • 85.214.191.236
AAAA
No records found.
MX
  • 10 23749.whserv.de.
NS
  • ns1.nshost2.de.
  • ns2.nshost2.de.
  • ns3.nshost2.net.
AS
Server in network STRATO STRATO AG, AS6724 · Germany85.214.191.0/24, which holds 85.214.191.236

Live preview

This is a live, sandboxed embed of sdk.org — not a copy. What it shows can change any time the site itself does.

Domain registration (WHOIS / RDAP)

Registrar
RegistryGate GmbH
Registered
1998-01-05
Expires
2027-01-04
Last changed
2026-08-12

Nameservers: ns1.nshost2.de, ns2.nshost2.de, ns3.nshost2.net

Status: client transfer prohibited

How to read WHOIS and RDAP data

SSL certificate

Common name
sdk.org
Issuer
C=US, O=Let's Encrypt, CN=YR2
Valid from
2026-09-13
Valid until
2026-12-12

Matches sdk.org exactly. Source: Certificate Transparency logs (crt.sh).

How to check when a certificate expires

HTTP & security headers

Response

Server
cloudflare
Content-Type
text/html; charset=utf-8
Cache-Control
no-cache, no-store, must-revalidate, no-cache, no-store, must-revalidate
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

What each security header does

Redirect chain

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

    → https://sdk.org/

  2. 2.https://sdk.org/HTTP 200

Meta tags

Title
Schutzgemeinschaft der Kapitalanleger e.V. | SdK
Description
Die 1959 gegründete SdK Schutzgemeinschaft der Kapitalanleger e.V. ist eine der führenden deutschen Anlegervereinigungen.
Canonical
Not set
Robots
Not set
Generator
SilverStripe - http://silverstripe.org
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

Disallow rules (User-agent: *)
2
Disallow rules (other agents)
14

No Sitemap declared in robots.txt.

Technology detected

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

  • Cloudflarecdn

    Server: cloudflare

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