astron.nl
ASTRON | Making discoveries in radio astronomy happen
Last scanned Jul 26, 2026, 5:17 AM · 19 views
Overall score
Excellent
Summary
ASTRON is the Netherlands Institute for Radio Astronomy, and is part of the Institutes organisation of NWO. This website uses WordPress hosted on SURFNET-NL - SURF B.V., NL. SEO is excellent (95/100) and accessibility is excellent (100/100). Security scores excellent (100/100) and performance fair (70/100). Top issue: Multiple H1 headings found.
ASTRON
ASTRON is the Netherlands Institute for Radio Astronomy, and is part of the Institutes organisation of NWO.
- Netherlands
- Hosted on SURFNET-NL - SURF B.V., NL
Top issues to fix
1 issue found
Multiple H1 headings found
SEOKeep a single H1 per page and demote the others to H2/H3.
SEO
1 issue(s) found
Performance
1.30 s
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
ASTRON
ASTRON is the Netherlands Institute for Radio Astronomy, and is part of the Institutes organisation of NWO.
Contact
Email, phone, and address published on this site's own pages.
- info@astron.nl
Source: https://www.astron.nl/contact/
Meta tags
- Title
- ASTRON | Making discoveries in radio astronomy happen
- Description
- ASTRON is the Netherlands Institute for Radio Astronomy, and is part of the Institutes organisation of NWO.
- Canonical
- https://www.astron.nl/
- Language
- en-US
- Charset
- UTF-8
- Viewport
- width=device-width, initial-scale=1.0
- Robots meta
- max-snippet:-1,max-image-preview:standard,max-video-preview:-1
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- SURFNET-NL - SURF B.V., NL
- CDN provider
- —
- IP address
- 195.169.155.206
- ASN
- AS1103 (SURFNET-NL - SURF B.V., NL)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME |
|
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Let's Encrypt
- Subject
- astron.nl
- Valid from
- Jun 24, 2026
- Valid to
- Sep 22, 2026
- Days until expiry
- 58
- SAN domains
- astron.nl, intranet.astron.nl, intranet.jive.eu, intranet.jive.nl, jive.eu, jive.nl, www.astron.nl, www.jive.eu, www.jive.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 6 · H2 2 · H3 4
Links
30 internal · 21 external · 0 broken
Images
19 total · 1 missing alt
Scripts / Styles
42 scripts · 17 stylesheets
JS / CSS size
145 KB · 1.1 MB
Page size
729 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 33
- sitemap.xml
- Found
- URLs in sitemap
- 724
SEO issues
- Multiple H1 headings found
Accessibility issues
No accessibility issues detected.
Careers
This company has an active careers page, but individual openings weren't reliably parsed from it — visit the page above for current listings.
Scan details
- Requested URL
- https://astron.nl
- Final URL
- https://www.astron.nl/
- HTTP status
- 200
- HTTP version
- HTTP/1.1
- Response time
- 1.28 s
- HTML size
- 729 KB
- Redirect chain
- https://astron.nl → https://www.astron.nl/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does astron.nl use?
- astron.nl is built with WordPress, WooCommerce, jQuery, Google Analytics, Apache.
- Is astron.nl secure (HTTPS)?
- Yes. astron.nl uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 22, 2026.
- Who hosts astron.nl?
- astron.nl is hosted on SURFNET-NL - SURF B.V., NL.
- What is astron.nl's SEO score?
- astron.nl scored 95/100 for SEO in the latest analysis (excellent).
- What is astron.nl's overall website score?
- astron.nl has an overall SiteGraph score of 91/100, combining SEO, performance, security, and accessibility.
- What company operates astron.nl?
- astron.nl is operated by ASTRON. ASTRON is the Netherlands Institute for Radio Astronomy, and is part of the Institutes organisation of NWO.
- Is astron.nl hiring?
- astron.nl has a careers page; check it directly for current openings.
OpenGraph & Twitter Card
OpenGraph
Twitter Card