What powers opensfm.org?
Last seen Oct 2026 · 11 technologies across 7 categories
Caching
Varnish
since Nov 2025
CDN
Cloudflare
since Nov 2025
Fastly
since Nov 2025
Font scripts
Google Font API
since Nov 2025
JavaScript frameworks
React
since Nov 2025
JavaScript graphics
Miscellaneous
PaaS
GitHub Pages
since Nov 2025
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Open Page Rank
2.20 / 10 · ranked #3,090,169 of all domains
10 referring domains · OpenPageRank
Page
- Language: English
- CDN: Cloudflare, Fastly
- Weight: 0.4 MB · 23 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on Cloudflare (104.21.15.65, IPv6)
- DNS: Cloudflare DNS
- Email: no MX record returned
- Email security: SPF (soft fail)
- SSL: Google Trust Services, ECDSA P256, wildcard, expires Nov 2026
- Common Crawl link graph: rank 1,923,859, 2 hosts
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Full technology history →
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Recent changes
- dropped Cloudflare Browser Insights Oct 2026