What powers classbug.com?
Last seen Jun 2026 · 18 technologies across 13 categories
Analytics
Caching
RackCache
since Jan 2019
CDN
Cloudflare
since May 2022
Mailgun
since Aug 2022
Font scripts
JavaScript libraries
Miscellaneous
HTTP/3
since Sep 2022
Open Graph
since Sep 2022
Programming languages
Ruby
since Jan 2019
RUM
Cloudflare Browser Insights
since Nov 2025
New Relic
since Jan 2019
Security
HSTS
since Sep 2022
UI frameworks
Web frameworks
Ruby on Rails
since Jan 2019
Webmail
Microsoft 365
since Aug 2022
Audience
- 74% desktop
- 26% phone
United States
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
2.35 / 10 · ranked #2,771,739 of all domains
18 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.2 s |
| INP | 50 ms |
| CLS | 0.4 |
| TTFB | 700 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- CDN: Cloudflare
- Weight: 6.6 MB · 45 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Jul 2026.
Full technology history →
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Recent changes
- detected Cloudflare Browser Insights Nov 2025