What powers yeonsung.ac.kr?
Last seen Sep 2026 · 51 technologies across 20 categories
Analytics
Google Analytics
since Aug 2020
Naver Analytics
since Nov 2023
CDN
Amazon S3
since Dec 2023
cdnjs
since Jul 2023
Cloudflare
since Jul 2023
Google Hosted Libraries
since Aug 2022
jsDelivr
since Dec 2023
Unpkg
since Jul 2023
Font scripts
Font Awesome
since Aug 2022
Google Font API
since Aug 2022
Issue trackers
Sentry
since May 2026
JavaScript frameworks
JavaScript graphics
Chart.js
since Dec 2023
JavaScript libraries
DHTMLX
since Nov 2025
OWL Carousel
since Aug 2022
Select2
since Nov 2024
Slick
since Apr 2019
Swiper
since Sep 2022
LMS
Moodle
since Dec 2023
Miscellaneous
Mobile frameworks
Operating systems
Ubuntu
since Nov 2023
Windows Server
since Aug 2022
PaaS
Amazon Web Services
since Dec 2023
Programming languages
Security
HSTS
since Nov 2022
UI frameworks
Video players
Web frameworks
Web servers
Apache HTTP Server
since Aug 2022
Webmail
Google Workspace
since Aug 2022
Widgets
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Oct 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
- Oct 2026 * removed from robots.txt
- Oct 2026 robots.txt removed
- Sep 2026 *: Allowed (was Blocked)
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
- 90% desktop
- 8% phone
- 3% tablet
South Korea
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.51 / 10 · ranked #2,473,825 of all domains
20 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.8 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 400 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Korean
- Weight: 0.9 MB · 72 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on NBPAP-AS-AP NAVER BUSINESS PLATFORM ASIA PACIFIC PTE. LTD. (223.130.136.144)
- DNS: yeonsung.ac.kr
- Email: Google Workspace
- Email security: SPF (soft fail), no DMARC record
- SSL: Sectigo, RSA 2048, wildcard, expires Jan 2027
- Common Crawl link graph: rank 3,124,300, 14 hosts
- Verified with: Cisco, Google, Microsoft 365
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| ymooc.yeonsung.ac.kr | 21 |
| www.yeonsung.ac.kr | 16 |
| eclass.yeonsung.ac.kr | 14 |
| 2021visual.yeonsung.ac.kr | 12 |
| ipsi.yeonsung.ac.kr | 11 |
| yeonsung.ac.kr | 11 |
| metis.yeonsung.ac.kr | 10 |
| old_eclass.yeonsung.ac.kr | 9 |
| ref.yeonsung.ac.kr | 9 |
| ctl.yeonsung.ac.kr | 8 |
| dept.yeonsung.ac.kr | 8 |
| library.yeonsung.ac.kr | 7 |
| carry.yeonsung.ac.kr | 5 |
| grp.yeonsung.ac.kr | 5 |
| portal.yeonsung.ac.kr | 4 |
| yuis.yeonsung.ac.kr | 4 |