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duisburg.de

Stadt Duisburg | Startseite | Stadtportal Duisburg

Last scanned Jul 27, 2026, 9:43 AM · 1 view

87

Overall score

Great

Summary

Duisburg verbindet - Ruhrgebiet, Niederrhein, Rheinland. This website uses PHP hosted on DVV-GMBH-AS - Duisburger Versorgungs- und Verkehrsgesellschaft mbH, DE. SEO is good (85/100) and accessibility is excellent (100/100). Security scores good (80/100) and performance good (85/100). Top issue: Missing canonical link.

Duisburg verbindet - Ruhrgebiet, Niederrhein, Rheinland. Herzlich willkommen!

Germany
Hosted on DVV-GMBH-AS - Duisburger Versorgungs- und Verkehrsgesellschaft mbH, DE

Top issues to fix

7 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-Frame-Options header

    Security

    Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.

  • 2 cookies without Secure/HttpOnly flags

    Security

    Set Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.

  • Missing canonical link

    SEO

    Add <link rel="canonical"> so search engines know which URL variant to index.

  • robots.txt not found

    SEO

    Publish /robots.txt with a Sitemap: directive to guide crawlers.

  • sitemap.xml not found

    SEO

    Publish an XML sitemap and reference it from robots.txt to speed up page discovery.

+1 more issue — details in the sections below.

85

SEO

3 issue(s) found

85

Performance

720 ms

80

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.

Duisburg verbindet - Ruhrgebiet, Niederrhein, Rheinland. Herzlich willkommen!

FacebookInstagramYouTube

Contact

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

Meta tags

Title
Stadt Duisburg | Startseite | Stadtportal Duisburg
Description
Duisburg verbindet - Ruhrgebiet, Niederrhein, Rheinland. Herzlich willkommen!
Canonical
Language
de-DE
Charset
UTF-8
Viewport
width=device-width, initial-scale=1, minimum-scale=1, user-scalable=yes
Robots meta
Manifest
https://duisburg.de/manifest.json

OpenGraph & Twitter Card

OpenGraph

og:title
Stadt Duisburg | Startseite
og:description
Duisburg verbindet - Ruhrgebiet, Niederrhein, Rheinland. Herzlich willkommen!
og:type
website
og:url
http://duisburg.de/

Twitter Card

twitter:card
summary
twitter:title
—
twitter:description
Duisburg verbindet - Ruhrgebiet, Niederrhein, Rheinland. Herzlich willkommen!

Technologies

Detected frameworks, languages, and tools.

PHP

Hosting & CDN

CDN provider
—
IP address
147.28.52.171
ASN
AS206141 (DVV-GMBH-AS - Duisburger Versorgungs- und Verkehrsgesellschaft mbH, DE)

DNS records

TypeValue
A
  • 147.28.52.171
AAAA—
MX
  • mx231.duit.de
TXT
  • MS=ms26794831
  • apple-domain-verification=zB8aKQXCCIaixQl8
NS
  • ns01.duit.de
  • ns02.duit.de
CAA
  • 0 issue "comodoca.com"
  • 0 issue "letsencrypt.org"
  • 0 iodef "mailto:hostmaster@duit.de"
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
Sectigo Limited
Subject
duisburg.de
Valid from
Apr 20, 2026
Valid to
Nov 4, 2026
Days until expiry
100
SAN domains
duisburg.de, *.duisburg.de, stadt-duisburg.de, www.stadt-duisburg.de

Security headers

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

Compression: gzip · 2 cookie(s) observed

Content & assets

Headings

H1 1 · H2 21 · H3 47

Links

82 internal · 23 external · 1 broken

Images

49 total · 0 missing alt

Scripts / Styles

13 scripts · 3 stylesheets

JS / CSS size

2.1 MB · 235 KB

Page size

282 KB

Robots.txt & Sitemap

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

SEO issues

  • Missing canonical link
  • robots.txt not found
  • sitemap.xml not found

Accessibility issues

No accessibility issues detected.

Scan details

Requested URL
https://duisburg.de
Final URL
https://duisburg.de
HTTP status
200
HTTP version
HTTP/1.1
Response time
715 ms
HTML size
282 KB
Redirect chain
https://duisburg.de

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does duisburg.de use?
duisburg.de is built with PHP.
Is duisburg.de secure (HTTPS)?
Yes. duisburg.de uses TLS 1.3 with a certificate issued by Sectigo Limited, valid until Nov 4, 2026.
Who hosts duisburg.de?
duisburg.de is hosted on DVV-GMBH-AS - Duisburger Versorgungs- und Verkehrsgesellschaft mbH, DE.
What is duisburg.de's SEO score?
duisburg.de scored 85/100 for SEO in the latest analysis (great).
What is duisburg.de's overall website score?
duisburg.de has an overall SiteGraph score of 87/100, combining SEO, performance, security, and accessibility.