What powers semantius.nl?
Last seen Sep 2026 · 14 technologies across 9 categories
Analytics
Cloudflare Browser Insights
since Dec 2024
Fathom
since Dec 2024
CDN
Bunny
since Dec 2024
Cloudflare
since Dec 2024
Font scripts
Bunny Fonts
since Dec 2024
JavaScript frameworks
JavaScript libraries
Axios
since Dec 2024
Miscellaneous
Programming languages
PHP
since Dec 2024
Security
HSTS
since Jun 2026
Web frameworks
AI Crawlers
Blocks 13 of 33 AI crawlers we track by name in its robots.txt, restricts 6 more. Checked Oct 2026.
Training crawlers
- Applebot-Extended Blocked
- Bytespider Blocked
- CCBot Blocked
- ClaudeBot Blocked
- cohere-training-data-crawler Blocked
- Diffbot Blocked
- Google-Extended Blocked
- GPTBot Blocked
- ImagesiftBot Blocked
- meta-externalagent Blocked
- Webzio-Extended Blocked
Search and AI assistants
- Amazonbot Blocked
- YouBot Blocked
- Claude-SearchBot Restricted
- OAI-SearchBot Restricted
- PerplexityBot Restricted
User-request fetchers
- ChatGPT-User Restricted
- Claude-User Restricted
- Perplexity-User Restricted
The other 14 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
- Sep 2026 perplexitybot added to robots.txt
- Sep 2026 Content Signals changed
- Sep 2026 claude-user added to robots.txt
- Sep 2026 claude-searchbot added to robots.txt
- Sep 2026 cohere-ai added to robots.txt
- Sep 2026 chatgpt-user added to robots.txt
AI Crawlers
13 of 33 AI crawlers blocked
Open Page Rank
2.86 / 10 · ranked #1,855,280 of all domains
14 referring domains · OpenPageRank
Infrastructure
- Hosted on Cloudflare (104.21.56.130, IPv6)
- DNS: Cloudflare DNS
- Email: Cloudflare Email Routing
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Google Trust Services, ECDSA P256, wildcard, expires Jan 2027
- Common Crawl link graph: rank 14,935,693
- Verified with: Google
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Full technology history →
Report an incorrect detection
Recent changes
- detected HSTS Jun 2026