What powers 
viessmann.com.vn?
Last seen Sep 2026 · 10 technologies across 8 categories
Analytics
Google Analytics
since Oct 2024
Matomo Analytics
since Nov 2024
CMS
Adobe Experience Manager
since Jul 2023
Cookie compliance
Usercentrics
since Jul 2023
JavaScript libraries
Miscellaneous
Open Graph
since Jul 2023
PWA
since Jul 2023
Programming languages
Java
since Jul 2023
Security
HSTS
since Jul 2023
Tag managers
Google Tag Manager
since Mar 2026
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Open Page Rank
4.08 / 10 · ranked #516,356 of all domains
48 referring domains · OpenPageRank
Page
- Language: Vietnamese
- CDN: Akamai
- Weight: 1.2 MB · 56 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on ASN-TSI-IAS Internet and VPN Service Provider (93.122.86.52)
- DNS: uu.net
- Email: no MX record returned
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 13,506,500, 2 hosts
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Full technology history →
Report an incorrect detection
Recent changes
- dropped core-js Jul 2026
- dropped Microsoft Advertising Jul 2026
- detected Google Tag Manager Mar 2026