What powers 
postf.org?
Last seen Sep 2026 · 12 technologies across 7 categories
Analytics
CDN
Font scripts
JavaScript libraries
Miscellaneous
PaaS
Web servers
AI Crawlers
Doesn't name any of the 33 AI crawlers we track in its robots.txt. Catch-all rules (User-agent: *) restrict some paths for every crawler, AI or not. Checked Oct 2026.
- robots.txt found
- llms.txt not checked
- ai.txt not checked
AI Crawlers
No AI crawlers blocked
Audience
- 75% desktop
- 25% phone
South Korea
Indonesia
India
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.15 / 10 · ranked #478,341 of all domains
73 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.3 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 800 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Korean
- Weight: 22.9 MB · 40 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- POSCO TJ Park Foundation
- Founded: 1971
- Country: South Korea
From Wikidata (CC0).
Infrastructure
- Hosted on Korea Telecom (203.245.44.84)
- DNS: Amazon Route 53
- Email: posco.net
- Email security: SPF (soft fail), no DMARC record
- SSL: Sectigo, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 104,155, 2 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.postf.org | 12 |
| postf.org | 11 |
Full technology history →
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Recent changes
- detected Amazon Web Services Sep 2026