What powers rs21ukclass.org?
Last seen Sep 2026 · 21 technologies across 13 categories
Analytics
Google Analytics
since Sep 2025
CDN
Cloudflare
since Sep 2026
StackPath
since Sep 2025
CMS
Databases
MySQL
since Sep 2025
Font scripts
Font Awesome
since Sep 2025
JavaScript libraries
OWL Carousel
since Sep 2025
Swiper
since Sep 2025
Miscellaneous
Open Graph
since Sep 2025
RSS
since Sep 2025
Page builders
Performance
Priority Hints
since Sep 2025
Programming languages
Security
Cloudflare Bot Management
since Sep 2026
Video players
Vimeo
since Sep 2026
Web servers
Apache HTTP Server
since Sep 2025
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
AI Crawlers
No AI crawlers blocked
Open Page Rank
1.82 / 10 · ranked #4,247,446 of all domains
14 referring domains · OpenPageRank
Infrastructure
- Hosted on 20i (185.151.30.204, IPv6)
- DNS: sustainable-hosting.co.uk
- Email: carrierzone.com
- Email security: SPF (soft fail), no DMARC record
- SSL: Let's Encrypt, RSA 2048, wildcard, expires Nov 2026
- Common Crawl link graph: rank 17,485,498, 2 hosts
- Verified with: Google
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted