What powers 
severance.healthcare?
Last seen Oct 2026 · 16 technologies across 8 categories
Analytics
CDN
JavaScript frameworks
JavaScript libraries
Miscellaneous
Programming languages
Rich text editors
UI frameworks
AI Crawlers
Blocks 2 of 33 AI crawlers we track by name in its robots.txt. Checked Nov 2026.
Training crawlers
- Bytespider Blocked
Search and AI assistants
- PetalBot Blocked
The other 31 AI crawlers we track are not mentioned and only inherit the catch-all rules that apply to every crawler.
- robots.txt found
- llms.txt not found
- ai.txt not found
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| severance korea | #3 | 3 |
| yonsei hospital | #92 | 0 |
| severance medical center | #47 | 0 |
| gangnam severance hospital | #66 | 0 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
Top backlinks
| From | Anchor text |
|---|---|
| convention.bio.org | (no text) |
| telex.hu | Severance kórházzal |
| medicalkorea.com | Severance Hospital |
| abk-korea.com | Yonsei University Health System |
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
AI Crawlers
2 of 33 AI crawlers blocked
Audience
- 61% desktop
- 38% phone
- 2% tablet
South Korea
United States
Canada
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
5.35 / 10 · ranked #178,235 of all domains
136 referring domains · OpenPageRank
Search traffic
3 est. monthly organic visits (US)
4 keywords in Google's top 30
Core Web Vitals
| LCP | 1 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 400 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Korean
- Weight: 4.1 MB · 36 requests
- Structured data: JSON-LD, Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- 세브란스 (Yonsei Cancer Hospital on Wikidata)
- Founded: 1969
- Country: South Korea
From the homepage's own structured data (Oct 2026) and Wikidata (CC0).
Infrastructure
- Registered Aug 2019 (7 years) via Gabia, Inc., renews Aug 2030
- Hosted on YONSEI01-AS-KR YONSEI UNIVERSITY HEALTH SYSTEM (128.134.212.121)
- DNS:
- Email: no MX record returned
- SSL: DigiCert, RSA 2048, wildcard, expires Feb 2027
- Common Crawl link graph: rank 105,285, 32 hosts
- Verified with: Google
DNS records as swept Oct 2026, certificate as seen Oct 2026, registration from the registry's RDAP service. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| online.severance.healthcare | 12 |
| gs.severance.healthcare | 11 |
| health.severance.healthcare | 11 |
| cancer.severance.healthcare | 10 |
| dental.severance.healthcare | 10 |
| gs-cancer.severance.healthcare | 10 |
| gs-dent.severance.healthcare | 10 |
| gs-hbv.severance.healthcare | 10 |
| gs-spine.severance.healthcare | 10 |
| member.severance.healthcare | 10 |
| myseverance.severance.healthcare | 10 |
| news.severance.healthcare | 10 |
| sev.severance.healthcare | 10 |
| severance.healthcare | 10 |
| www.severance.healthcare | 10 |
| yi.severance.healthcare | 10 |
| dhc.severance.healthcare | 9 |
| fund.severance.healthcare | 9 |
| medicine.severance.healthcare | 9 |
| recruit.severance.healthcare | 9 |
| research.severance.healthcare | 9 |
| robotmis.severance.healthcare | 9 |
| sev-children.severance.healthcare | 9 |
| sev-eye.severance.healthcare | 9 |