What powers semantics21.com?
Last seen Aug 2026 · 33 technologies across 20 categories
Advertising
Microsoft Advertising
since Aug 2026
Analytics
Cloudflare Browser Insights
since Feb 2026
Google Analytics
since Jul 2024
HubSpot Analytics
since Jul 2024
CDN
cdnjs
since Jul 2024
Cloudflare
since Jul 2024
CMS
Cookie compliance
CookieYes
since Jul 2024
Databases
MySQL
since Jul 2024
Font scripts
Google Font API
since Jul 2024
JavaScript libraries
Live chat
HubSpot Chat
since Jul 2024
Marketing automation
HubSpot
since Jul 2024
Miscellaneous
PaaS
Cloudways
since Jul 2024
Page builders
Breakdance
since Aug 2026
Performance
Priority Hints
since Jul 2024
Programming languages
PHP
since Jul 2024
Security
Cloudflare Bot Management
since Jul 2024
UI frameworks
Video players
YouTube
since Jul 2024
Webmail
Microsoft 365
since Jul 2024
WordPress plugins
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 Sep 2026.
- robots.txt found
- llms.txt found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Standards: llms.txt
Open Page Rank
1.78 / 10 · ranked #4,449,867 of all domains
14 referring domains · OpenPageRank
Infrastructure
- Hosted on Cloudflare (104.21.10.138, IPv6)
- Email: Microsoft 365
- Email security: no SPF record, no DMARC record
- SSL: Google Trust Services, ECDSA P256, wildcard, expires Dec 2026
- Common Crawl link graph: rank 11,472,836, 5 hosts
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
- dropped reCAPTCHA Aug 2026
- detected Cloudways Apr 2026
- detected reCAPTCHA Apr 2026
- dropped Matomo Analytics Feb 2026
- dropped reCAPTCHA Feb 2026