What powers 
sis.edu.vn?
Last seen Aug 2026 · 34 technologies across 16 categories
Analytics
CDN
CMS
Databases
Font scripts
Hosting
JavaScript libraries
Miscellaneous
Performance
Programming languages
Security
UI frameworks
Web servers
Webmail
WordPress plugins
WordPress themes
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Sep 2026.
- robots.txt found
- llms.txt not checked
- ai.txt not checked
- Aug 2026 * removed from robots.txt
- Aug 2026 * added to robots.txt
AI Crawlers
No AI crawlers blocked
Audience
- 66% desktop
- 34% phone
Vietnam
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.97 / 10 · ranked #588,577 of all domains
28 referring domains · OpenPageRank
Core Web Vitals
| LCP | 4.1 s |
| CLS | 0 |
| TTFB | 2700 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English (United Kingdom)
- Weight: 17.1 MB · 144 requests
- WordPress theme: hello-elementor (child: sis) · all themes
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Singapore International School @ Da Nang
From the homepage's own structured data (Sep 2026).
Infrastructure
- Hosted on NHANHOA-AS-VN NhanHoa Software company (45.117.177.70)
- DNS: inet.vn
- Email: Microsoft 365
- Email security: SPF (hard fail), DMARC monitor only
- SSL: Sectigo, RSA 2048, wildcard, expires Feb 2027
- Common Crawl link graph: rank 3,564,768, 14 hosts
- Verified with: Apple Business, Brevo
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| sis.edu.vn | 25 |
| bdnewcity.sis.edu.vn | 24 |
| vungtau.sis.edu.vn | 24 |
| cantho.sis.edu.vn | 23 |
| gamudagardens.sis.edu.vn | 23 |
| saigonsouth.sis.edu.vn | 23 |
| vanphuc.sis.edu.vn | 23 |
| ciputra.sis.edu.vn | 22 |
| danang.sis.edu.vn | 22 |
| halong.sis.edu.vn | 22 |
| lechan.sis.edu.vn | 17 |
| swanbay.sis.edu.vn | 15 |
Full technology history →
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Recent changes
- dropped W3 Total Cache Jul 2026
- dropped Font Awesome Feb 2026
- dropped jQuery Mobile Feb 2026
- dropped Lodash Nov 2025
- detected Slick Nov 2025