What powers 
viessmann.bg?
Last seen Oct 2026 · 10 technologies across 8 categories
Analytics
CMS
Cookie compliance
JavaScript libraries
Miscellaneous
Programming languages
Security
Tag managers
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Nov 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 72% phone
- 29% desktop
Bulgaria
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.96 / 10 · ranked #598,832 of all domains
52 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.7 s |
| INP | 100 ms |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Oct 2026.
Page
- Language: Bulgarian (Bulgaria)
- CDN: Akamai
- Weight: 1.1 MB · 54 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
From the homepage's own structured data (Oct 2026).
Infrastructure
- Hosted on ASN-TSI-IAS Telekom Deutschland GmbH (93.122.86.52)
- DNS: uu.net
- Email: Proofpoint Essentials
- Email security: no SPF record, no DMARC record
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 14,670,993, 2 hosts
DNS records as swept Nov 2026, certificate as seen Nov 2026. How the web is hosted
Full technology history →
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Recent changes
- dropped core-js Aug 2026
- dropped Google Workspace Aug 2026
- dropped Microsoft Advertising Aug 2026
- detected Google Tag Manager Mar 2026