cwi.nl

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cwi.nl is ranked #4,172 in the Tranco list of the world's most popular websites (list of Oct 13, 2026), up 71 places in four weeks. The domain was registered on Apr 30, 1986, 40 years, 5 months ago, through SURF B.V.. Its homepage uses Matomo. It is served through cdnjs by Nginx.

Global rank

#4,172

▲ 6 this week

Domain age

40 years

since Apr 30, 1986

Technologies

detected on the homepage

SEO score

83/100

homepage checks

Popularity rank

#4,172 of the top 1 million sites in the Tranco research ranking, which averages several traffic and DNS sources over 30 days. Best rank in the period shown: #4,029.

Weekly Tranco rank (lower is more popular).

See where cwi.nl sits in the top 10,000

Domain registration

Registered: Apr 30, 1986 (40 years, 5 months ago)
Expires: —
Registrar: SURF B.V.
Name servers: ns1.zurich.surf.net, ns2.cwi.nl, ns1.cwi.nl, dwalin.nikhef.nl
DNSSEC: Signed

From the registry's public RDAP record, checked Oct 1, 2026.

Technology stack

Analytics

Matomo

CDN

cdnjs

Web servers

Nginx

Detected from the homepage HTML and response headers on Oct 14, 2026. Tools loaded only after scripts run (or after consent banners) may be missing.

Homepage SEO check

Checked from the HTML our scanner received on Oct 14, 2026. Content added later by JavaScript isn't counted.

83/100

https://www.cwi.nl/en/

Home

(no meta description)

16 passed · 6 warnings · 1 failed

Content

!Title4 characters — aim for 15–65
✕Meta descriptionMissing
✓H1 headingExactly one H1
✓Subheadings18 H2 headings
✓Image alt textAll 8 images have alt text
✓Content lengthAbout 834 words

Indexing

✓IndexableNo noindex directive
!Canonical URLMissing
✓robots.txtFound
!XML sitemapNot found
✓Language attributeen
!Structured dataNo JSON-LD or microdata

Social sharing

!Open Graph2 of 3 key tags set
✓Twitter / X cardsummary_large_image

Technical

✓HTTPSServed over HTTPS
✓Mobile viewportFound
✓FaviconFound
✓Character encodingutf-8

Security headers

✓Strict-Transport-SecuritySet
!Content-Security-PolicyNot set
✓Clickjacking protectionSet
✓X-Content-Type-OptionsSet
✓Referrer-PolicySet

Server response

Final URL: https://www.cwi.nl/en/
HTTP status: 200
Server: nginx
Response time: 6.81 s (first byte 6.81 s, from our scanner in a US data centre)
HTML size: 79 KB
Compression: none reported

Sites with a similar tech stack

Rank	Website	Built with
#3,569	zenodo.org	cdnjs, Nginx, Matomo

Sites ranked near cwi.nl

Rank	Website	Registered	Built with
#4,167	playfamily.ru	—	Nginx
#4,168	redcross.org	1995	Akamai
#4,169	sonicwall.com	1998	—
#4,170	hybrid-analysis.com	2014	Next.js, React, Cloudflare
#4,171	abc.com	1996	Amazon CloudFront, Nginx, Bootstrap
#4,173	tk0x1.com	2016	—
#4,174	apachelounge.com	2003	Apache, Google Analytics, Google AdSense
#4,175	spreaker.com	2009	Alpine.js, Amazon CloudFront, Google Tag Manager
#4,176	6sc.co	—	—
#4,177	carnival.com	1994	Akamai, Nginx, Google Fonts

Questions about cwi.nl

How popular is cwi.nl?

cwi.nl is #4,172 worldwide in the Tranco list published Oct 13, 2026.

How old is cwi.nl?

cwi.nl was registered on Apr 30, 1986, which makes the domain 40 years, 5 months old.

What is cwi.nl built with?

We detected Matomo, cdnjs and Nginx on its homepage.

Who is the registrar of cwi.nl?

SURF B.V., according to the registry's RDAP record.