4.cn
4.CN - Buy, Sell & Park Domain Names
Last scanned Jul 21, 2026, 12:33 PM · 2 views
Overall score
Fair
Top issues to fix
14 issues found · 4 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Over half of images are missing alt text
AccessibilityAdd alt attributes to images — screen readers depend on them, and they help image SEO.
Missing viewport meta tag
AccessibilityAdd <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
+8 more issues — details in the sections below.
Summary
4.CN is the global and professional marketplace for buying and selling domain names. This website uses PHP. SEO is fair (70/100) and accessibility is fair (65/100). Security scores fair (65/100) and performance good (80/100). Top issue: Meta description longer than 160 characters.
SEO
5 issue(s) found
Performance
3.15 s
Security
HTTPS & header checks
Accessibility
2 issue(s) found
Organization
Company details published in this site's own structured data.
Contact
Email, phone, and address published on this site's own pages.
- Kiki@4.CN
Meta tags
- Title
- 4.CN - Buy, Sell & Park Domain Names
- Description
- 4.CN is the global and professional marketplace for buying and selling domain names. We have over 1.500.000 domains in our marketplace. Currently we are the leading domain auction platform and domain escrow service provider in China now.
- Canonical
- Language
- en
- Charset
- utf-8
- Viewport
- Robots meta
- all, index, follow, noodp
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- —
- IP address
- 69.234.239.50
- ASN
- —
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.2
- Issuer
- Let's Encrypt
- Subject
- *.4.cn
- Valid from
- Jun 8, 2026
- Valid to
- Sep 6, 2026
- Days until expiry
- 47
- SAN domains
- *.4.cn, 4.cn
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 1 cookie(s) observed
Content & assets
Headings
H1 1 · H2 4 · H3 0
Links
81 internal · 13 external · 4 broken
Images
14 total · 9 missing alt
Scripts / Styles
18 scripts · 5 stylesheets
JS / CSS size
204 KB · 82.3 KB
Page size
46.6 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 1
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Meta description longer than 160 characters
- Missing canonical link
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- sitemap.xml not found
Accessibility issues
- Over half of images are missing alt text
- Missing viewport meta tag
Scan details
- Requested URL
- https://4.cn
- Final URL
- https://www.4.cn/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 3.15 s
- HTML size
- 46.6 KB
- Redirect chain
- https://4.cn → https://www.4.cn/
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Frequently asked questions
- What technology does 4.cn use?
- 4.cn is built with PHP, jQuery, Google Analytics, Nginx.
- Is 4.cn secure (HTTPS)?
- Yes. 4.cn uses TLS 1.2 with a certificate issued by Let's Encrypt, valid until Sep 6, 2026.
- Who hosts 4.cn?
- Hosting provider information for 4.cn is not available yet.
- What is 4.cn's SEO score?
- 4.cn scored 70/100 for SEO in the latest analysis (fair).
- What is 4.cn's overall website score?
- 4.cn has an overall SiteGraph score of 70/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card