What powers si.re.kr?
Last seen Oct 2026 · 42 technologies across 17 categories
Analytics
CDN
CMS
Databases
Font scripts
Issue trackers
JavaScript frameworks
JavaScript libraries
Load balancers
Miscellaneous
PaaS
Programming languages
Rich text editors
Security
Web frameworks
Web servers
WordPress plugins
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 Nov 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
- Sep 2026 *: Restricted (was Blocked)
- Aug 2026 *: Blocked (was Restricted)
- Aug 2026 *: Restricted (was Blocked)
AI Crawlers
No AI crawlers blocked
Audience
- 79% desktop
- 12% tablet
- 8% phone
South Korea
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.05 / 10 · ranked #535,258 of all domains
98 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.6 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 900 ms |
Real user p75, Chrome UX Report, Oct 2026.
Page
- Language: Korean
- Weight: 11.6 MB · 119 requests
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- The Seoul Institute
- Founded: 1992
- Country: South Korea
From Wikidata (CC0).
Infrastructure
- Registered May 2012 (14 years), renews May 2029
- Hosted on Korea Telecom (211.38.10.4)
- DNS: si.re.kr
- Email: si.re.kr
- Email security: SPF (soft fail), no DMARC record
- SSL: GlobalSign, RSA 2048, wildcard, expires Mar 2027
- Common Crawl link graph: rank 586,755, 13 hosts
DNS records as swept Nov 2026, certificate as seen Nov 2026, registration from the registry's RDAP service. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| data.si.re.kr | 17 |
| simac.si.re.kr | 16 |
| seoulnetzero.si.re.kr | 14 |
| gitlab.si.re.kr | 12 |
| global.si.re.kr | 10 |
| si.re.kr | 9 |
| www.si.re.kr | 9 |
| vpn.si.re.kr | 2 |
Full technology history →
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Recent changes
- dropped Bootstrap Aug 2026
- dropped LottieFiles Aug 2026
- dropped Underscore.js Aug 2026
- detected Bootstrap Icons Jul 2026
- detected Google Analytics Jul 2026