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Domain report

downsed.org

downsed.org ranks in the top 0.45% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 4 distinct hosts observed under it.

Explore downsed.org in the Web Graph

Connectivity

#601,458harmonic-centrality rank
Top percentile
0.45%
Hosts observed
4

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

DNS records

A
  • 150.171.110.211
AAAA
No records found.
MX
  • 0 downsed-org.mail.protection.outlook.com.
NS
  • ns1-03.azure-dns.com.
  • ns2-03.azure-dns.net.
  • ns3-03.azure-dns.org.
  • ns4-03.azure-dns.info.

Live preview

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

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
no-store,no-cache
Content-Encoding
Not sent

Security

Content-Security-Policy
Not sent
Strict-Transport-Security
max-age=31536000; includeSubDomains
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://downsed.org/HTTP 307

    → https://downsed.org/

  2. 2.https://downsed.org/HTTP 302

    → https://www.down-syndrome.org/

  3. 3.https://www.down-syndrome.org/HTTP 302

    → https://www.down-syndrome.org/en-gb/

  4. 4.https://www.down-syndrome.org/en-gb/HTTP 200

Meta tags

Title
Down Syndrome Education Online
Description
Effective, evidence-based resources and support from leaders in scientific research transforming outcomes for children with Down syndrome.
Canonical
https://www.down-syndrome.org/en-gb/
Robots
Not set
Generator
Not set
Open Graph title
Down Syndrome Education Online
Open Graph description
Effective, evidence-based resources and support from leaders in scientific research transforming outcomes for children with Down syndrome.
Open Graph image
https://cdn.down-syndrome.org/assets/static/seeandlearn/vocabulary-3/vocabulary-3-selecting-pictures-4x-en-001-750x490.jpg
Open Graph type
website
Twitter card
summary_large_image
Twitter title
Down Syndrome Education Online
Twitter image
https://cdn.down-syndrome.org/assets/static/seeandlearn/vocabulary-3/vocabulary-3-selecting-pictures-4x-en-001-750x490.jpg

robots.txt

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

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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