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dt-internet.de

D&T Internet GmbH – Fullservice-Internet-Dienstleister aus Köln

Last scanned Jul 26, 2026, 1:19 PM

80

Overall score

Great

Summary

Fullservice-Internet-Dienstleister aus Köln: TYPO3-Agentur, Swyx-Cloud-Telefonanlagen (HostedPBX), Content-Management, Internet-Provider. This website uses Apache. SEO is fair (70/100) and accessibility is excellent (90/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Title longer than 60 characters.

Fullservice-Internet-Dienstleister aus Köln: TYPO3-Agentur, Swyx-Cloud-Telefonanlagen (HostedPBX), Content-Management, Internet-Provider.

Top issues to fix

11 issues found · 2 high priority

  • Missing Strict-Transport-Security header

    Security

    Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • 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.

  • Multiple H1 headings found

    SEO

    Keep a single H1 per page and demote the others to H2/H3.

+5 more issues — details in the sections below.

70

SEO

5 issue(s) found

100

Performance

856 ms

65

Security

HTTPS & header checks

90

Accessibility

1 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.

Fullservice-Internet-Dienstleister aus Köln: TYPO3-Agentur, Swyx-Cloud-Telefonanlagen (HostedPBX), Content-Management, Internet-Provider.

Contact

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

Meta tags

Title
D&T Internet GmbH – Fullservice-Internet-Dienstleister aus Köln
Description
Fullservice-Internet-Dienstleister aus Köln: TYPO3-Agentur, Swyx-Cloud-Telefonanlagen (HostedPBX), Content-Management, Internet-Provider.
Canonical
https://www.dt-internet.de/startseite/
Language
Charset
utf-8
Viewport
width=device-width, minimum-scale=1.0
Robots meta
Manifest
https://www.dt-internet.de/manifest.json?v=eEEXm6BYwK

OpenGraph & Twitter Card

OpenGraph

og:title
Startseite
og:description
Fullservice-Internet-Dienstleister aus Köln: TYPO3-Agentur, Swyx-Cloud-Telefonanlagen (HostedPBX), Content-Management, Internet-Provider.
og:type
website
og:url
https://www.dt-internet.de/startseite/

Twitter Card

twitter:card
—
twitter:title
—
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

jQueryApache

Hosting & CDN

Hosting provider
—
CDN provider
—
IP address
—
ASN
—

DNS records

TypeValue
A—
AAAA—
MX—
TXT—
NS—
CAA—
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.2
Issuer
Sectigo Limited
Subject
dt-internet.de
Valid from
Apr 27, 2026
Valid to
Nov 11, 2026
Days until expiry
106
SAN domains
dt-internet.de, www.dt-internet.de

Security headers

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

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 5 · H2 11 · H3 3

Links

20 internal · 3 external · 20 broken

Images

2 total · 0 missing alt

Scripts / Styles

12 scripts · 3 stylesheets

JS / CSS size

3.8 KB · 0 B

Page size

25.6 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
  • Multiple H1 headings found
  • No structured data (JSON-LD) found
  • robots.txt not found
  • sitemap.xml not found

Accessibility issues

  • Missing <html lang> attribute

Scan details

Requested URL
https://dt-internet.de
Final URL
https://www.dt-internet.de/startseite/
HTTP status
200
HTTP version
HTTP/1.1
Response time
856 ms
HTML size
25.6 KB
Redirect chain
https://dt-internet.de → https://www.dt-internet.de/ → https://www.dt-internet.de/startseite/

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does dt-internet.de use?
dt-internet.de is built with jQuery, Apache.
Is dt-internet.de secure (HTTPS)?
Yes. dt-internet.de uses TLS 1.2 with a certificate issued by Sectigo Limited, valid until Nov 11, 2026.
Who hosts dt-internet.de?
Hosting provider information for dt-internet.de is not available yet.
What is dt-internet.de's SEO score?
dt-internet.de scored 70/100 for SEO in the latest analysis (fair).
What is dt-internet.de's overall website score?
dt-internet.de has an overall SiteGraph score of 80/100, combining SEO, performance, security, and accessibility.