What powers 
louisbolk.nl?
Last seen Sep 2026 · 13 technologies across 8 categories
Analytics
CDN
CMS
JavaScript libraries
Miscellaneous
Programming languages
Web servers
Webmail
AI Crawlers
Blocks 8 of 33 AI crawlers we track by name in its robots.txt. Checked Oct 2026.
Training crawlers
- Applebot-Extended Blocked
- Bytespider Blocked
- CCBot Blocked
- ClaudeBot Blocked
- Google-Extended Blocked
- GPTBot Blocked
- meta-externalagent Blocked
Search and AI assistants
- Amazonbot Blocked
The other 25 AI crawlers we track are not mentioned and stay allowed by default.
- robots.txt found
- llms.txt not found
- ai.txt not found
Content Signals:
search=yes ai-train=no declared in robots.txt
- Sep 2026 *: Allowed (was Restricted)
- Aug 2026 bytespider added to robots.txt
- Aug 2026 ccbot added to robots.txt
- Aug 2026 applebot-extended added to robots.txt
- Aug 2026 meta-externalagent added to robots.txt
- Aug 2026 amazonbot added to robots.txt
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| embryology | #43 | 35 |
| biochemical pdf | #2 | 34 |
| embryology definition | #60 | 31 |
| define embryology | #66 | 31 |
| what is embryology | #61 | 6 |
| biochemistry pdf | #8 | 4 |
| embryology definition biology | #81 | 3 |
| andean lupin | #8 | 1 |
| lupin plant disease | #67 | 1 |
| dr battjes | #40 | 1 |
| embryology pdf | #8 | 1 |
| embryology meaning | #66 | 1 |
| basics of biochemistry | #53 | 0 |
| basic biochemistry pdf | #18 | 0 |
| basic biochemistry | #71 | 0 |
| your simple guide to reversing type 2 diabetes pdf | #88 | 0 |
| biochemistry: a short course 4th edition pdf free | #52 | 0 |
| biochemistry theory | #25 | 0 |
| biochemistry study guide pdf | #37 | 0 |
| biochemistry pathways pdf | #72 | 0 |
| biochemistry notes pdf | #35 | 0 |
| biochemistry basic | #73 | 0 |
| biochemistry a short course pdf | #49 | 0 |
| biochemistry a short course 3rd edition pdf free | #41 | 0 |
| biochemical basis | #92 | 0 |
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
8 of 33 AI crawlers blocked
Standards: Content Signals
Audience
- 55% desktop
- 45% phone
Netherlands
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
5.54 / 10 · ranked #154,513 of all domains
169 referring domains · OpenPageRank
Search traffic
150 est. monthly organic visits (US)
82 keywords in Google's top 30
Core Web Vitals
| LCP | 0.7 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Dutch
- CDN: Cloudflare
- Weight: 0.7 MB · 20 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Louis Bolk Institute
- Founded: 1976
- Country: Netherlands
From Wikidata (CC0).
Infrastructure
- Hosted on Cloudflare (104.21.12.241, IPv6)
- DNS: Cloudflare DNS
- Email: Microsoft 365
- Email security: SPF (hard fail), DMARC quarantine
- SSL: Google Trust Services, ECDSA P256, wildcard, expires Nov 2026
- Common Crawl link graph: rank 504,275, 2 hosts
- Verified with: Cisco Duo
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.louisbolk.nl | 13 |
| louisbolk.nl | 10 |
Full technology history →
Report an incorrect detection
Recent changes
- detected Cloudflare Sep 2026
- detected Cloudflare Browser Insights Sep 2026
- detected HTTP/3 Sep 2026