What powers 
opencasebook.org?
Last seen Oct 2026 · 14 technologies across 9 categories
Analytics
CDN
Font scripts
Issue trackers
JavaScript frameworks
JavaScript libraries
Miscellaneous
Rich text editors
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 Nov 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 96% desktop
- 4% phone
United States
Puerto Rico
India
Canada
United Kingdom
Indonesia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.98 / 10 · ranked #248,024 of all domains
152 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.6 s |
| INP | 25 ms |
| CLS | 0.3 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Oct 2026.
Page
- Language: English
- CDN: Cloudflare
- Weight: 1.3 MB · 31 requests
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Registered Aug 2017 (9 years) via NameCheap, Inc., renews Aug 2027
- Hosted on Cloudflare (104.16.74.80, IPv6)
- DNS: Cloudflare DNS
- Email: Google Workspace
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Google Trust Services, ECDSA P256, wildcard, expires Dec 2026
- Common Crawl link graph: rank 468,218, 2 hosts
- Verified with: Google
DNS records as swept Nov 2026, certificate as seen Nov 2026, registration from the registry's RDAP service. How the web is hosted
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