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Domain report

html5test.com

html5test.com ranks in the top 0.016% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 6 distinct hosts observed under it.

Explore html5test.com in the Web Graph

Connectivity

#21,618harmonic-centrality rank
Top percentile
0.016%
Hosts observed
6

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://html5test.com/ answered with HTTP 200.

DNS records

A
  • 104.21.1.145
  • 172.67.129.108
AAAA
  • 2606:4700:3031::ac43:816c
  • 2606:4700:3035::6815:191
MX
  • 10 in1-smtp.messagingengine.com.
  • 20 in2-smtp.messagingengine.com.
NS
  • eva.ns.cloudflare.com.
  • jonah.ns.cloudflare.com.
AS
Server in network CLOUDFLARENET, AS13335 · United States104.21.1.0/24, which holds 104.21.1.145

Live preview

This is a live, sandboxed embed of html5test.com — not a copy. What it shows can change any time the site itself does.

Domain registration (WHOIS / RDAP)

Registrar
Realtime Register B.V.
Registered
2010-03-08
Expires
2027-03-08
Last changed
2026-03-09

Nameservers: EVA.NS.CLOUDFLARE.COM, JONAH.NS.CLOUDFLARE.COM

Status: client transfer prohibited

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, 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
nosniff
Referrer-Policy
strict-origin-when-cross-origin
Permissions-Policy
Not sent

What each security header does

Redirect chain

  1. 1.http://html5test.com/HTTP 301

    → https://html5test.com/

  2. 2.https://html5test.com/HTTP 200

Meta tags

Title
HTML5test - How well does your browser support HTML5?
Description
Not set
Canonical
Not set
Robots
Not set
Generator
Not set
Open Graph title
The HTML5 test - How well does your browser support HTML5?
Open Graph description
The HTML5 test score is an indication of how well your browser supports the upcoming HTML5 standard and related specifications. How well does your browser support HTML5?
Open Graph image
https://html5test.com/images/thumbnail.jpg
Open Graph type
website
Twitter card
Not set
Twitter title
Not set
Twitter image
Not set

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

Related domains

Similar connectivity

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