What powers 
nioz.nl?
Last seen Sep 2026 · 30 technologies across 18 categories
Analytics
CDN
CMS
Comment systems
Issue trackers
JavaScript frameworks
JavaScript graphics
JavaScript libraries
Maps
Miscellaneous
Operating systems
Programming languages
Recruitment & staffing
Security
UI frameworks
Video players
Web servers
Webmail
AI Crawlers
Doesn't name any of the 33 AI crawlers we track in its robots.txt. Catch-all rules (User-agent: *) restrict some paths for every crawler, AI or not. Checked Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| polyp jellyfish | #2 | 290 |
| sibes | #2 | 96 |
| spang | #26 | 57 |
| kelps life cycle | #1 | 43 |
| life cycle of kelp | #1 | 43 |
| how do seaweed reproduce | #1 | 43 |
| how does seaweed reproduce | #1 | 33 |
| how does seaweed grow | #2 | 28 |
| seaweed species | #10 | 21 |
| nioz | #1 | 21 |
| is seaweed a plant | #8 | 20 |
| marine ecology | #10 | 18 |
| karline | #8 | 17 |
| ulva | #15 | 15 |
| research ship | #19 | 12 |
| seaweed reproduction | #1 | 12 |
| polyp stage of jellyfish | #4 | 11 |
| polyp stage jellyfish | #4 | 11 |
| horse mackerel fish | #9 | 11 |
| atlantic horse mackerel | #90 | 9 |
| seaweed flower | #6 | 9 |
| jellyfish polyp stage | #5 | 8 |
| jellyfish polyp | #20 | 6 |
| jellyfish life cycle | #25 | 6 |
| jellyfish ephyra | #6 | 6 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
AI Crawlers
No AI crawlers blocked
Audience
- 63% desktop
- 37% phone
Netherlands
United States
Germany
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
7.07 / 10 · ranked #35,065 of all domains
572 referring domains · OpenPageRank
Search traffic
1,000 est. monthly organic visits (US)
461 keywords in Google's top 30
Core Web Vitals
| LCP | 1.5 s |
| INP | 100 ms |
| CLS | 0 |
| TTFB | 900 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English
- Weight: 6.3 MB · 88 requests
- Structured data: Microdata, OpenGraph
Homepage as crawled by the HTTP Archive, Sep 2026.
Similar sites
nvb.nl 3 shared
Closest technology stacks among the highest-authority sites we track; "shared" counts the distinctive technologies in common.
Organisation
- Royal Netherlands Institute of Sea Research
- Founded: 1876
- Country: Netherlands
From Wikidata (CC0).
Infrastructure
- Registered Jun 1990 (36 years) via Prolocation B.V.
- Hosted on SURFNET-NL SURFnet, The Netherlands (145.1.115.86, IPv6)
- DNS: as41887.nl
- Email: Microsoft 365
- Email security: SPF (soft fail), DMARC monitor only, DNSSEC signed, CAA
- SSL: HARICA, ECDSA P256, expires Feb 2027
- Common Crawl link graph: rank 21,251, 27 hosts
- Verified with: Apple Business, DocuSign, Google, Microsoft 365
DNS records as swept Oct 2026, certificate as seen Oct 2026, registration from the registry's RDAP service. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.nioz.nl | 14 |
| maps.nioz.nl | 13 |
| workingat.nioz.nl | 12 |
| www-5.nioz.nl | 8 |
Full technology history →
Report an incorrect detection
Recent changes
- dropped Lodash Apr 2026
- dropped Concrete CMS Feb 2026
- dropped Google Analytics Feb 2026
- dropped ZURB Foundation Feb 2026
- detected Drupal Jan 2026
- detected Lodash Jan 2026
- detected LottieFiles Jan 2026
- detected Plausible Jan 2026
- detected Ubuntu Jan 2026
- detected VideoJS Jan 2026