What powers clfa.or.kr?
Last seen Jul 2025 · 14 technologies across 8 categories
Analytics
CDN
Cloudflare
since Aug 2022
Microsoft Ajax Content Delivery Network
since Aug 2022
JavaScript libraries
Operating systems
Windows Server
since Apr 2019
Security
Cloudflare Bot Management
since Aug 2022
Video players
Web frameworks
Microsoft ASP.NET
since Apr 2019
Web servers
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Sep 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
- 74% desktop
- 26% phone
South Korea
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
5.29 / 10 · ranked #204,687 of all domains
84 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.1 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 600 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Weight: 14.4 MB · 90 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on SK Broadband (221.139.2.219)
- DNS: whoisdomain.kr
- Email: worksmobile.com
- Email security: SPF (soft fail), no DMARC record
- SSL: TuringSign Global SA, RSA 2048, wildcard, expires Dec 2026
- Common Crawl link graph: rank 6,957,563, 5 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| edu.clfa.or.kr | 13 |
| clfa.or.kr | 5 |
| www.clfa.or.kr | 5 |
| license.clfa.or.kr | 2 |