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opensafely.org

opensafely.org ranks in the top 0.52% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 10 distinct hosts observed under it.

Explore opensafely.org in the Web Graph

Connectivity

#688,273harmonic-centrality rank
Top percentile
0.52%
Hosts observed
10

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

DNS records

A
  • 104.26.0.93
  • 172.67.71.193
  • 104.26.1.93
AAAA
  • 2606:4700:20::681a:15d
  • 2606:4700:20::681a:5d
  • 2606:4700:20::ac43:47c1
MX
  • 1 aspmx.l.google.com.
  • 10 aspmx2.googlemail.com.
  • 10 aspmx3.googlemail.com.
  • 5 alt1.aspmx.l.google.com.
  • 5 alt2.aspmx.l.google.com.
NS
  • elliot.ns.cloudflare.com.
  • sandy.ns.cloudflare.com.
AS
Server in network CLOUDFLARENET, AS13335 · United States104.26.0.0/24, which holds 104.26.0.93

Live preview

Screenshot of opensafely.org

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

Since opensafely.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)

Registrar
Gandi SAS
Registered
2020-04-19
Expires
2027-04-19
Last changed
2026-08-11

Nameservers: elliot.ns.cloudflare.com, sandy.ns.cloudflare.com

Status: client transfer prohibited

How to read WHOIS and RDAP data

SSL certificate

Certificate Transparency lookup failed: The operation was aborted due to timeout

How to check when a certificate expires

HTTP & security headers

Response

Server
cloudflare
Content-Type
text/html; charset=UTF-8
Cache-Control
max-age=15552000, must-revalidate
Content-Encoding
Not sent

Security

Content-Security-Policy
Not sent
Strict-Transport-Security
max-age=31536000
X-Frame-Options
SAMEORIGIN
X-Content-Type-Options
nosniff
Referrer-Policy
no-referrer
Permissions-Policy
Not sent

What each security header does

Redirect chain

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

    → https://www.opensafely.org/

  2. 2.https://www.opensafely.org/HTTP 200

Meta tags

Title
OpenSAFELY - A platform for analysing large, sensitive datasets
Description
OpenSAFELY is a platform for analysing large, sensitive datasets – safely and securely. OpenSAFELY is built by a team at the Bennett Institute.
Canonical
https://www.opensafely.org/
Robots
max-snippet:-1,max-image-preview:large,max-video-preview:-1
Generator
Not set
Open Graph title
OpenSAFELY - A platform for analysing large, sensitive datasets
Open Graph description
OpenSAFELY is a platform for analysing large, sensitive datasets – safely and securely. OpenSAFELY is built by a team at the Bennett Institute.
Open Graph image
https://www.opensafely.org/wp-content/uploads/2026/02/cropped-os-image.jpg
Open Graph type
website
Twitter card
summary_large_image
Twitter title
OpenSAFELY - A platform for analysing large, sensitive datasets
Twitter image
https://www.opensafely.org/wp-content/uploads/2026/02/cropped-os-image.jpg

robots.txt

Disallow rules (User-agent: *)
1
Disallow rules (other agents)
0

Sitemap declared:

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

Technology detected

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

  • Cloudflarecdn

    Server: cloudflare

  • WordPresscms

    Found "wp-content/" in the page's HTML

  • Cloudflare Bot Managementcdn

    Cookie set: __cf_bm

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