What technology does d-nb.info use?

d-nb.info is built with Apache.

Is d-nb.info secure (HTTPS)?

Yes. d-nb.info uses TLS 1.3 with a certificate issued by Hellenic Academic and Research Institutions CA, valid until Feb 6, 2027.

Hosting provider information for d-nb.info is not available yet.

What is d-nb.info's SEO score?

d-nb.info scored 35/100 for SEO in the latest analysis (poor).

What is d-nb.info's overall website score?

d-nb.info has an overall SiteGraph score of 66/100, combining SEO, performance, security, and accessibility.

Has d-nb.info's score changed over time?

d-nb.info's overall score has declined by 14 points (from 80 to 66) since Jul 26, 2026.

d-nb.info

Last scanned Aug 2, 2026, 8:00 AM · 8 views

Overall score

Fair

Summary

This website uses Apache. SEO is poor (35/100) and accessibility is good (75/100). Security scores good (80/100) and performance good (80/100). Top issue: Missing <title>.

Top issues to fix

14 issues found · 6 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 title tag
SEO
Add a unique, descriptive <title> tag — it's the single most important on-page SEO element.
Missing meta description
SEO
Add a ~150-character meta description to control your search-result snippet and lift click-through rate.
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.
Missing viewport meta tag
Accessibility
Add <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.

+8 more issues — details in the sections below.

SEO

8 issue(s) found

Performance

3.69 s

Security

HTTPS & header checks

Accessibility

3 issue(s) found

Score history

-14 overall since Jul 26, 2026

Overall: 66
SEO: 35
Security: 80
Performance: 80
Accessibility: 75

Technologies

Detected frameworks, languages, and tools.

Apache

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: Hellenic Academic and Research Institutions CA
Subject: portal.dnb.de
Valid from: Jul 22, 2026
Valid to: Feb 6, 2027
Days until expiry: 188
SAN domains: portal.dnb.de

Security headers

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

Compression: gzip · 1 cookie(s) observed

Content & assets

Headings

H1 0 · H2 0 · H3 0

Links

0 internal · 0 external · 0 broken

Images

0 total · 0 missing alt

Scripts / Styles

0 scripts · 0 stylesheets

JS / CSS size

0 B · 0 B

Page size

164 B

Robots.txt & Sitemap

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

SEO issues

Missing <title>
Missing meta description
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://d-nb.info
Final URL: https://portal.dnb.de/index.htm
HTTP status: 200
HTTP version: HTTP/2
Response time: 3.69 s
HTML size: 164 B
Redirect chain: https://d-nb.info → https://portal.dnb.de → http://portal.dnb.de/index.htm → https://portal.dnb.de/index.htm

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does d-nb.info use?: d-nb.info is built with Apache.
Is d-nb.info secure (HTTPS)?: Yes. d-nb.info uses TLS 1.3 with a certificate issued by Hellenic Academic and Research Institutions CA, valid until Feb 6, 2027.
Who hosts d-nb.info?: Hosting provider information for d-nb.info is not available yet.
What is d-nb.info's SEO score?: d-nb.info scored 35/100 for SEO in the latest analysis (poor).
What is d-nb.info's overall website score?: d-nb.info has an overall SiteGraph score of 66/100, combining SEO, performance, security, and accessibility.
Has d-nb.info's score changed over time?: d-nb.info's overall score has declined by 14 points (from 80 to 66) since Jul 26, 2026.