What powers classup.io?
Last seen Jun 2026 · 28 technologies across 14 categories
Analytics
CDN
Amazon CloudFront
since Sep 2023
Amazon S3
since Sep 2023
jQuery CDN
since Sep 2023
jsDelivr
since Jun 2023
Font scripts
Google Font API
since Aug 2025
JavaScript frameworks
React
since Jun 2023
JavaScript graphics
JavaScript libraries
Live chat
Channel.io
since Jun 2023
Miscellaneous
PaaS
Amazon Web Services
since Jun 2023
Performance
Priority Hints
since Jan 2026
Programming languages
Node.js
since Jun 2023
RUM
Datadog
since Sep 2024
Security
HSTS
since Mar 2026
Tag managers
Google Tag Manager
since Jun 2023
Audience
- 100% desktop
South Korea
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
0.26 / 10 · ranked #66,898,540 of all domains
0 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.9 s |
| INP | 100 ms |
| CLS | 0.2 |
| TTFB | 100 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Korean
- CDN: Amazon CloudFront
- Weight: 22.9 MB · 173 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| admin.classup.io | 21 |
| academy.classup.io | 17 |
| classup.io | 17 |
| link.classup.io | 8 |
Full technology history →
Report an incorrect detection
Recent changes
- detected HSTS Mar 2026
- detected Priority Hints Jan 2026
- detected Google Font API Aug 2025