What technology does 51.net use?

51.net is built with PHP, Nginx.

Is 51.net secure (HTTPS)?

Yes. 51.net uses TLS 1.3 with a certificate issued by Sectigo Limited, valid until Sep 26, 2026.

Hosting provider information for 51.net is not available yet.

What is 51.net's SEO score?

51.net scored 50/100 for SEO in the latest analysis (fair).

What is 51.net's overall website score?

51.net has an overall SiteGraph score of 65/100, combining SEO, performance, security, and accessibility.

51.net

虎翼网 - 虎翼网（51.net）：虚拟主机，域名注册，16年服务！

Last scanned Jul 26, 2026, 11:19 AM

Overall score

Fair

Summary

虎翼网虚拟主机是市场上稳定性非常高的虚拟主机产品! 所有虚拟主机免费试用10天,ICANN和CNNIC认证!企业版虚拟主机16年运营中在线率超过99.99%！虎翼网是域名注册机构�… This website uses Nginx. SEO is fair (50/100) and accessibility is poor (45/100). Security scores good (75/100) and performance excellent (90/100). Top issue: Title longer than 60 characters.

虎翼网虚拟主机是市场上稳定性非常高的虚拟主机产品! 所有虚拟主机免费试用10天,ICANN和CNNIC认证!企业版虚拟主机16年运营中在线率超过99.99%！虎翼网是域名注册机构。高端后台虚拟主机管理系统

Top issues to fix

16 issues found · 4 high priority

Missing Content-Security-Policy header
Security
Add a CSP to control which sources can run scripts — the strongest single defense against XSS.
No H1 heading found
SEO
Add exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
Over half of images are missing alt text
Accessibility
Add alt attributes to images — screen readers depend on them, and they help image SEO.
Missing viewport meta tag
Accessibility
Add <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.
Missing X-Content-Type-Options header
Security
Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
Security
Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.

+10 more issues — details in the sections below.

SEO

8 issue(s) found

Performance

272 ms

Security

HTTPS & header checks

Accessibility

4 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

Company details published in this site's own structured data.

Contact

Email, phone, and address published on this site's own pages.

Email: domain@51.net

Meta tags

Title: 虎翼网 - 虎翼网（51.net）：虚拟主机，域名注册，16年服务！
Description: 虎翼网虚拟主机是市场上稳定性非常高的虚拟主机产品! 所有虚拟主机免费试用10天,ICANN和CNNIC认证!企业版虚拟主机16年运营中在线率超过99.99%！虎翼网是域名注册机构。高端后台虚拟主机管理系统
Canonical
Language
Charset: UTF-8
Viewport
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

PHP Nginx

Hosting & CDN

Hosting provider: —
CDN provider: —
IP address: —
ASN: —

DNS records

Type	Value
A	—
AAAA	—
MX	—
TXT	—
NS	—
CAA	—
CNAME	—
IPv6 support	No

TLS / SSL certificate

Version: TLS 1.3
Issuer: Sectigo Limited
Subject: www.51.net
Valid from: Sep 25, 2025
Valid to: Sep 26, 2026
Days until expiry: 60
SAN domains: www.51.net, 51.net

Security headers

Strict-Transport-SecurityEnabled
Content-Security-PolicyMissing
X-Frame-OptionsMissing
X-Content-Type-OptionsMissing
Referrer-PolicyMissing
Permissions-PolicyMissing

Compression: gzip · 1 cookie(s) observed

Content & assets

Headings

H1 0 · H2 0 · H3 0

Links

36 internal · 9 external · 20 broken

Images

86 total · 82 missing alt

Scripts / Styles

12 scripts · 3 stylesheets

JS / CSS size

13.4 KB · 676 B

Page size

98.2 KB

Robots.txt & Sitemap

robots.txt: Not found
Disallow rules: 0
sitemap.xml: Not found
URLs in sitemap: 0

SEO issues

Title longer than 60 characters
Meta description longer than 160 characters
Missing canonical link
No H1 heading found
No structured data (JSON-LD) found
Missing OpenGraph tags
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://51.net
Final URL: https://51.net
HTTP status: 200
HTTP version: HTTP/2
Response time: 270 ms
HTML size: 98.2 KB
Redirect chain: https://51.net

See something wrong on this report? Request a correction

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