What powers douclass.com?
Last seen Jun 2026 · 48 technologies across 20 categories
Analytics
Google Analytics
since Feb 2020
Naver Analytics
since Feb 2022
CDN
Amazon CloudFront
since Jun 2024
Amazon S3
since May 2022
cdnjs
since Jul 2023
Cloudflare
since Jul 2023
Editors
DreamWeaver
since Feb 2019
Font scripts
Google Font API
since Feb 2019
JavaScript frameworks
JavaScript graphics
JavaScript libraries
Clipboard.js
since Apr 2024
Howler.js
since Dec 2023
Select2
since Apr 2024
Slick
since Apr 2019
Swiper
since Oct 2023
Load balancers
Amazon ALB
since Sep 2023
Miscellaneous
HTTP/3
since Jun 2024
Kakao
since Mar 2023
LottieFiles
since Feb 2024
Open Graph
since Sep 2022
Popper
since Apr 2024
PWA
since Aug 2022
Operating systems
PaaS
Amazon Web Services
since May 2022
Programming languages
Security
HSTS
since May 2026
Tag managers
Google Tag Manager
since Feb 2020
UI frameworks
Video players
YouTube
since Mar 2019
Web frameworks
Express
since Oct 2023
Web server extensions
Web servers
Webmail
Google Workspace
since Nov 2022
Audience
- 96% desktop
- 2% tablet
- 1% phone
South Korea
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
2.25 / 10 · ranked #2,976,818 of all domains
9 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.6 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 100 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Weight: 73.7 MB · 157 requests
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| aidt.douclass.com | 15 |
| canvas.douclass.com | 15 |
| onbook.douclass.com | 14 |
| www.douclass.com | 14 |
| archive.douclass.com | 13 |
| old.douclass.com | 13 |
| testwiz.douclass.com | 12 |
| ai-test.douclass.com | 11 |
| ele.douclass.com | 11 |
| mh.douclass.com | 11 |
| sign.douclass.com | 11 |
| textbook.douclass.com | 11 |
| promotion.douclass.com | 10 |
| viewer.workbook.douclass.com | 9 |
| workbook.douclass.com | 9 |
| preview.douclass.com | 6 |
| chasi.www.douclass.com | 5 |
| smartbook2.douclass.com | 4 |
| middle.science.douclass.com | 3 |
| hermes.douclass.com | 1 |