What technology does sidn.nl use?

We did not detect any specific technologies for sidn.nl in the latest scan.

Is sidn.nl secure (HTTPS)?

Yes. sidn.nl uses TLS 1.3 with a certificate issued by Hellenic Academic and Research Institutions CA, valid until Nov 6, 2026.

Hosting provider information for sidn.nl is not available yet.

What is sidn.nl's SEO score?

sidn.nl scored 90/100 for SEO in the latest analysis (excellent).

What is sidn.nl's overall website score?

sidn.nl has an overall SiteGraph score of 92/100, combining SEO, performance, security, and accessibility.

Has sidn.nl's score changed over time?

sidn.nl's overall score has improved by 3 points (from 89 to 92) since Jul 26, 2026.

sidn.nl

Zorgeloos online | SIDN

Last scanned Aug 2, 2026, 7:00 AM · 8 views

Overall score

Excellent

Summary

Bij SIDN check je de beschikbaarheid van een .nl-domeinnaam. SEO is excellent (90/100) and accessibility is excellent (100/100). Security scores excellent (100/100) and performance good (80/100). Top issue: robots.txt not found.

SIDN

Bij SIDN check je de beschikbaarheid van een .nl-domeinnaam. Wij bieden je ook securityoplossingen, zoals SIDN Merkbewaking.

Top issues to fix

4 issues found · 1 high priority

Slow estimated load (4.4s)
Performance
Use a CDN, enable caching/compression, and cut render-blocking assets — every extra second costs conversions.
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.
20 broken links on the page
SEO
Fix or remove broken links — they waste crawl budget and erode user trust.

SEO

2 issue(s) found

Performance

4.41 s

100

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Score history

+3 overall since Jul 26, 2026

Overall: 92
SEO: 90
Security: 100
Performance: 80
Accessibility: 100

Organization

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

SIDN

Bij SIDN check je de beschikbaarheid van een .nl-domeinnaam. Wij bieden je ook securityoplossingen, zoals SIDN Merkbewaking.

LinkedIn Facebook Instagram YouTube X (Twitter)

Contact

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

Email: support@sidn.nl
Phone: +31263525500

Meta tags

Title: Zorgeloos online | SIDN
Description: Bij SIDN check je de beschikbaarheid van een .nl-domeinnaam. Wij bieden je ook securityoplossingen, zoals SIDN Merkbewaking.
Canonical: https://www.sidn.nl/
Language: nl
Charset: utf-8
Viewport: width=device-width,initial-scale=1
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

No technologies detected.

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: sidn.nl
Valid from: Nov 6, 2025
Valid to: Nov 6, 2026
Days until expiry: 96
SAN domains: sidn.nl, www.sidn.nl

Security headers

Strict-Transport-SecurityEnabled
Content-Security-PolicyEnabled
X-Frame-OptionsEnabled
X-Content-Type-OptionsEnabled
Referrer-PolicyEnabled
Permissions-PolicyEnabled

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 1 · H2 14 · H3 7

Links

49 internal · 15 external · 20 broken

Images

20 total · 0 missing alt

Scripts / Styles

6 scripts · 1 stylesheets

JS / CSS size

3.6 KB · 0 B

Page size

156 KB

Robots.txt & Sitemap

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

SEO issues

robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://sidn.nl
Final URL: https://www.sidn.nl/
HTTP status: 200
HTTP version: HTTP/2
Response time: 4.41 s
HTML size: 156 KB
Redirect chain: https://sidn.nl → https://www.sidn.nl/

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Frequently asked questions

What technology does sidn.nl use?: We did not detect any specific technologies for sidn.nl in the latest scan.
Is sidn.nl secure (HTTPS)?: Yes. sidn.nl uses TLS 1.3 with a certificate issued by Hellenic Academic and Research Institutions CA, valid until Nov 6, 2026.
Who hosts sidn.nl?: Hosting provider information for sidn.nl is not available yet.
What is sidn.nl's SEO score?: sidn.nl scored 90/100 for SEO in the latest analysis (excellent).
What is sidn.nl's overall website score?: sidn.nl has an overall SiteGraph score of 92/100, combining SEO, performance, security, and accessibility.
What company operates sidn.nl?: sidn.nl is operated by SIDN. Bij SIDN check je de beschikbaarheid van een .nl-domeinnaam. Wij bieden je ook securityoplossingen, zoals SIDN Merkbewaking.
Has sidn.nl's score changed over time?: sidn.nl's overall score has improved by 3 points (from 89 to 92) since Jul 26, 2026.