What powers duo.vn?
Last seen Aug 2026 · 10 technologies across 9 categories
Analytics
Google Analytics
since Jan 2019
CDN
Google Hosted Libraries
since Feb 2022
JavaScript libraries
Operating systems
Windows Server
since Jan 2019
Programming languages
PHP
since Jan 2019
Security
HSTS
since Sep 2022
Tag managers
Google Tag Manager
since Jan 2019
Web frameworks
Web servers
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Sep 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
Vietnam
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
6.00 / 10 · ranked #110,106 of all domains
453 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.4 s |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Weight: 1.0 MB · 31 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on VNPT-AS-VN VIETNAM POSTS AND TELECOMMUNICATIONS GROUP (103.9.204.239)
- DNS: pavietnam.vn
- Email: pavietnam.vn
- Email security: SPF (soft fail), no DMARC record
- SSL: Sectigo, RSA 2048, expires Oct 2026
- Common Crawl link graph: rank 112,147, 5 hosts
- Verified with: GlobalSign
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| id.duo.vn | 6 |
| diendan.duo.vn | 5 |