What powers langmaster.edu.vn?
Last seen Aug 2026 · 38 technologies across 18 categories
Advertising
Analytics
Authentication
CDN
Font Scripts
JavaScript Frameworks
JavaScript libraries
Miscellaneous
Operating systems
Performance
Programming languages
Security
Tag Managers
Video players
Web Frameworks
Web servers
Webmail
Widgets
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
AI Crawlers
No AI crawlers blocked
Audience
- 62% desktop
- 36% phone
- 2% tablet
Vietnam
United States
Hong Kong SAR China
Australia
Uzbekistan
South Korea
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.95 / 10 · ranked #610,211 of all domains
67 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.7 s |
| INP | 200 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Vietnamese
- Weight: 10.2 MB · 190 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Học tiếng Anh Langmaster
- Industry: Education (declares
EducationalOrganization) - Profiles: Facebook, YouTube, TikTok
From the homepage's own structured data (Sep 2026).
Infrastructure
- Hosted on VTDC-AS-VN Vietel - CHT Compamy Ltd (171.244.51.234)
- Email: Google Workspace
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Sectigo, RSA 2048, wildcard, expires Mar 2027
- Common Crawl link graph: rank 2,094,423, 7 hosts
- Verified with: Google, Meta Business
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| langmaster.edu.vn | 27 |
| careers.langmaster.edu.vn | 10 |
| giangvien.langmaster.edu.vn | 10 |
| tienganh.langmaster.edu.vn | 10 |
| www.langmaster.edu.vn | 10 |
| online.langmaster.edu.vn | 9 |
| tructuyen.langmaster.edu.vn | 6 |
| test.langmaster.edu.vn | 4 |
Full technology history →
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Recent changes
- detected Priority Hints Jun 2026
- detected SweetAlert2 Mar 2026
- detected Google AdSense Feb 2026
- detected Microsoft Clarity Feb 2026
- detected reCAPTCHA Feb 2026
- detected TikTok Pixel Feb 2026
- dropped AOS Nov 2025
- dropped Google AdSense Nov 2025
- dropped Microsoft Clarity Nov 2025
- dropped reCAPTCHA Nov 2025
- dropped TikTok Pixel Nov 2025
- detected Bootstrap Icons Oct 2025
- detected cdnjs Oct 2025
- detected Cloudflare Oct 2025
- detected jQuery CDN Oct 2025
- detected jsDelivr Oct 2025