What powers cs168.io?
Last seen Jun 2026 · 13 technologies across 10 categories
Caching
Varnish
since Sep 2023
CDN
Font scripts
Google Font API
since Jan 2019
JavaScript graphics
JavaScript libraries
Miscellaneous
Open Graph
since Oct 2024
PaaS
GitHub Pages
since Jan 2019
Programming languages
Ruby
since Jan 2019
Security
HSTS
since Sep 2025
Static site generator
Audience
- 100% desktop
United States
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
1.58 / 10 · ranked #5,823,553 of all domains
7 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.5 s |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Jun 2026.
Subdomains
| Host | Techs |
|---|---|
| textbook.cs168.io | 9 |
| fa24.cs168.io | 8 |
| sp25.cs168.io | 8 |
| su25.cs168.io | 8 |
| sp26.cs168.io | 7 |
| cs168.io | 5 |