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Domain report

w3.org

w3.org ranks in the top 0.000035% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 126 distinct hosts observed under it.

Explore w3.org in the Web Graph

Connectivity

#46harmonic-centrality rank
Top percentile
0.000035%
Hosts observed
126

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

HTTPS reachability

403HTTP status

https://w3.org/ answered with HTTP 403.

DNS records

A
  • 104.18.22.19
  • 104.18.23.19
AAAA
  • 2606:4700::6812:1613
  • 2606:4700::6812:1713
MX
  • 5 pan.w3.org.
  • 5 puck.w3.org.
NS
  • jamie.ns.cloudflare.com.
  • pranab.ns.cloudflare.com.

Live preview

Screenshot of w3.org

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

Since w3.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
1994-07-06
Expires
2029-07-05
Last changed
2026-08-12

Nameservers: jamie.ns.cloudflare.com, pranab.ns.cloudflare.com

Status: client delete prohibited, client transfer prohibited

How to read WHOIS and RDAP data

SSL certificate

Certificate Transparency lookup failed (HTTP 502).

How to check when a certificate expires

HTTP & security headers

Response

Server
cloudflare
Content-Type
text/html; charset=UTF-8
Cache-Control
private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Content-Encoding
Not sent

Security

Content-Security-Policy
Not sent
Strict-Transport-Security
Not sent
X-Frame-Options
SAMEORIGIN
X-Content-Type-Options
nosniff
Referrer-Policy
same-origin
Permissions-Policy
Not sent

What each security header does

Redirect chain

  1. 1.http://w3.org/HTTP 403

Meta tags

Title
Attention Required! | Cloudflare
Description
Not set
Canonical
Not set
Robots
noindex, nofollow
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

robots.txt request failed (HTTP 403).

Technology detected

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

  • Cloudflarecdn

    Server: cloudflare

  • Cloudflare Bot Managementcdn

    Cookie set: __cf_bm

Related domains

Linked with w3.org

Domains that link to it or that it links to, best connected first.

Similar connectivity

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