What powers 
spirula.nl?
Last seen Aug 2026 · 19 technologies across 12 categories
Analytics
CMS
Databases
Font scripts
JavaScript libraries
Miscellaneous
Performance
Programming languages
Security
Web servers
Webmail
WordPress plugins
AI Crawlers
Blocks 4 of 33 AI crawlers we track by name in its robots.txt. Checked Sep 2026.
Training crawlers
- Bytespider Blocked
Search and AI assistants
- Amazonbot Blocked
- Applebot Blocked
- PetalBot Blocked
The other 29 AI crawlers we track are not mentioned and only inherit the catch-all rules that apply to every crawler.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
4 of 33 AI crawlers blocked
Audience
Netherlands
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.54 / 10 · ranked #854,690 of all domains
36 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 1500 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Dutch (Netherlands)
- Weight: 6.9 MB · 85 requests
- WordPress theme: enfold · all themes
- Structured data: JSON-LD, Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Nederlandse Malacologische Vereniging (Netherlands Malacological Society on Wikidata)
- Founded: 1934
- Country: Netherlands
- Profiles: Facebook
From the homepage's own structured data (Sep 2026) and Wikidata (CC0).
Infrastructure
- Hosted on UNISERVER-AS (62.148.185.11)
- DNS: dnstools.nl
- Email: Microsoft 365
- Email security: SPF (hard fail), DMARC monitor only
- SSL: Let's Encrypt, RSA 4096, expires Dec 2026
- Common Crawl link graph: rank 1,057,505, 2 hosts
- Verified with: Google
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Full technology history →
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Recent changes
- detected Microsoft 365 Jan 2026
- detected Twitter Emoji (Twemoji) Dec 2025