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4.cn

https://4.cn· First analyzed 13 Feb 2026· Updated 13 Feb 2026
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4.cn
Desktop screenshot of 4.cn
Mobile screenshot of 4.cn
Mobile

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Hosting Provider

aws.amazon.com

IP Address

69.234.239.50

Server Location

🇨🇳 Yinchuan, China

ASN

AS135629

Organization

AWS EC2 (cn-northwest-1)

Server

Nginx

Nameservers

vip3.alidns.com.vip4.alidns.com.

Performance

Page Speed

242 KB
50 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Amazon Web Services (AWS)

Technology Stack

7 Technologies Detected

Libraries

1

CSS Frameworks

1

Web Servers

1

Languages

1

Customer Support

1

SEO Analysis

D50/100
6
5
2
4
4.cn4.cn

4.CN - Buy, Sell & Park Domain Names

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 ...

Description truncated.
Title Length36 chars

Recommended: 50-60 chars

Description Length237 chars

Recommended: 120-160 chars

Issues (2)

  • Many images missing alt text (12/13)
  • Missing viewport meta tag - page may not be mobile-friendly

Crawlability

Sitemap
robots.txt

2 rules

Allows all crawlers

Sponsored

Sponsored

F

Security Score

0%Critical
Critical / Transactional

HTTPS

No WAF

50d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

05.01.2026

Valid Until

05.04.2026

Subject Alternative Names (2)

*.4.cn4.cn

SHA-256 Fingerprint

30:35:6D:E8:42:08:21:A2:51:5C:EC:33:CB:56:EC:E4:09:F6:FD:A3...

Top Recommendations

Security recommendation preview

HTTP Headers

Developer Console

cache-control
🔴 No Cache(no-store, no-cache, must-revalidate)
content-encoding
📦 Gzip(gzip)
content-type
text/html; charset=UTF-8
date
Fri, 13 Feb 2026 08:36:56 GMT
expires
Thu, 19 Nov 1981 08:52:00 GMT
pragma
no-cache
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

98

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

mail.tutanota.de

Domain Information

4.cn

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

Typography & Readability

Arial

28/100
Readability
/30
10/40

12px · LH --

Hierarchy
/20
8/25

1x ratio

WCAG
/25
5/15

Contrast: undefined

Performance
/25
20/20

System fonts

Heading Font

Arial

Sans12px

Body Font

Arial

Sans12px

Contrast Ratio

--

Reading Comfort

~41 CPL

Needs attention
12px
h1
12px
h2
12px
p
Minor Second
Scale

❌ Critical: 12px body text is too small. Increase to at least 14px.

⚠️ Weak hierarchy: Headlines should be at least 2x body size for clear visual structure.

✅ Excellent performance: System fonts eliminate font loading delays (better LCP).

✅ Consistent design: Single font family with weight variations is a modern best practice.

⚠️ Risky: Text appears on background images without overlay protection.

⚠️ Cramped layout: 20 elements lack adequate spacing.

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

Sponsored

Scripts & Styles

17 Resources

12
Scripts
5
Styles
1
Async
0
Defer

Top Script Sources

local(10)google-analytics.com(1)s141.cnzz.com(1)

Website Identity

4.cn

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Last analyzed: 13 Feb 2026 at 08:37

Historical Analysis & Change Tracking