What powers 
ncats.io?
Last seen Aug 2026 · 29 technologies across 16 categories
Analytics
CDN
Databases
Font scripts
JavaScript frameworks
JavaScript graphics
JavaScript libraries
Miscellaneous
Operating systems
PaaS
Programming languages
Security
Tag managers
UI frameworks
Web frameworks
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 Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
- Sep 2026 robots.txt appeared
- Sep 2026 * added to robots.txt
- Sep 2026 * removed from robots.txt
- Aug 2026 robots.txt removed
AI Crawlers
No AI crawlers blocked
Audience
- 50% desktop
- 49% phone
- 1% tablet
United States
India
Germany
Brazil
United Kingdom
Australia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
5.33 / 10 · ranked #182,093 of all domains
153 referring domains · OpenPageRank
Core Web Vitals
| LCP | 4.4 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 1900 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English
- CDN: Amazon CloudFront
- Weight: 14.7 MB · 130 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on Amazon Web Services (34.200.21.115)
- DNS: Amazon Route 53
- Email: Amazon SES / WorkMail
- Email security: no SPF record, no DMARC record
- SSL: Amazon Trust Services, RSA 2048, expires Feb 2027
- Common Crawl link graph: rank 56,928, 17 hosts
- Verified with: Google
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| drugs.ncats.io | 16 |
| cure.ncats.io | 13 |
| frontend.m.jchem.test.gsrs.ncats.io | 13 |
Full technology history →
Report an incorrect detection
Recent changes
- dropped Amazon ALB Mar 2026
- detected Ubuntu Feb 2026