What technology does 51dns.com use?

51dns.com is built with jQuery, Nginx.

Is 51dns.com secure (HTTPS)?

Yes. 51dns.com uses TLS 1.3 with a certificate issued by Asseco Data Systems S.A., valid until Jan 30, 2027.

Hosting provider information for 51dns.com is not available yet.

What is 51dns.com's SEO score?

51dns.com scored 65/100 for SEO in the latest analysis (fair).

What is 51dns.com's overall website score?

51dns.com has an overall SiteGraph score of 75/100, combining SEO, performance, security, and accessibility.

51dns.com

帝恩思-DNS-域名解析-域名注册-SSL证书-DNS综合服务商

Last scanned Jul 26, 2026, 5:47 AM

Overall score

Fair

Summary

帝恩思是2012年成立的新三板挂牌企业（证券代码 837018），致力成为全球知名DNS综合服务商。服务涵盖了：域名解析、DNS加速、域名注册、SSL证书、等保测评、IPv6转换�… This website uses Nginx. SEO is fair (65/100) and accessibility is excellent (100/100). Security scores good (75/100) and performance fair (65/100). Top issue: Title longer than 60 characters.

帝恩思是2012年成立的新三板挂牌企业（证券代码 837018），致力成为全球知名DNS综合服务商。服务涵盖了：域名解析、DNS加速、域名注册、SSL证书、等保测评、IPv6转换等。通过创新技术打造数字资产安全产品、应用安全监测和域名安全服务，保护在线业务免受网络威胁。

Top issues to fix

11 issues found · 1 high priority

Missing Strict-Transport-Security header
Security
Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
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.
Title longer than 60 characters
SEO
Shorten the title to under 60 characters so search results don't truncate it.
Meta description longer than 160 characters
SEO
Trim the meta description to under 160 characters to avoid truncation in search results.
No structured data (JSON-LD) found
SEO
Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.

+5 more issues — details in the sections below.

SEO

6 issue(s) found

Performance

3.08 s

Security

HTTPS & header checks

100

Accessibility

0 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.

Meta tags

Title: 帝恩思-DNS-域名解析-域名注册-SSL证书-DNS综合服务商
Description: 帝恩思是2012年成立的新三板挂牌企业（证券代码 837018），致力成为全球知名DNS综合服务商。服务涵盖了：域名解析、DNS加速、域名注册、SSL证书、等保测评、IPv6转换等。通过创新技术打造数字资产安全产品、应用安全监测和域名安全服务，保护在线业务免受网络威胁。
Canonical: https://www.51dns.com/
Language: en
Charset: UTF-8
Viewport: width=device-width, initial-scale=1.0
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

jQuery 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: Asseco Data Systems S.A.
Subject: *.51dns.com
Valid from: Dec 31, 2025
Valid to: Jan 30, 2027
Days until expiry: 187
SAN domains: *.51dns.com, 51dns.com

Security headers

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

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 1 · H2 5 · H3 5

Links

97 internal · 38 external · 2 broken

Images

17 total · 0 missing alt

Scripts / Styles

14 scripts · 7 stylesheets

JS / CSS size

1.6 MB · 0 B

Page size

90.9 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
No structured data (JSON-LD) found
Missing OpenGraph tags
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://51dns.com
Final URL: https://www.51dns.com/
HTTP status: 200
HTTP version: HTTP/1.1
Response time: 3.08 s
HTML size: 90.9 KB
Redirect chain: https://51dns.com → https://www.51dns.com/

See something wrong on this report? Request a correction

Same technology stack

foresee.com

Predictive Analytics for Customer Experience | Verint

100

wordpressnginxjquery

Fastly· Fastly

iquw.com

Home | Starr | IQUW

100

wordpressnginxgoogle-analytics

AWS

tec.mx

Inicio | Tecnológico de Monterrey

100

nginxdrupaljquery

INCAPSULA - Incapsula Inc, US· Fastly

quago.io

Home - Quago

100

wordpressnginxgoogle-analytics

hallensteins.co.nz

Hallensteins | Menswear NZ

100

nginxjqueryphp

Fastly· Fastly

owncloud.com

ownCloud - share files and folders, easy and secure

100

wordpressnginxgoogle-analytics

kues-data - KUES DATA GmbH, DE

Frequently asked questions

What technology does 51dns.com use?: 51dns.com is built with jQuery, Nginx.
Is 51dns.com secure (HTTPS)?: Yes. 51dns.com uses TLS 1.3 with a certificate issued by Asseco Data Systems S.A., valid until Jan 30, 2027.
Who hosts 51dns.com?: Hosting provider information for 51dns.com is not available yet.
What is 51dns.com's SEO score?: 51dns.com scored 65/100 for SEO in the latest analysis (fair).
What is 51dns.com's overall website score?: 51dns.com has an overall SiteGraph score of 75/100, combining SEO, performance, security, and accessibility.

Top issues to fix

Organization

Meta tags

OpenGraph & Twitter Card

Technologies

Hosting & CDN

DNS records

TLS / SSL certificate

Security headers

Content & assets

Robots.txt & Sitemap

SEO issues

Accessibility issues

Scan details

Related websites

Frequently asked questions