What powers zahlbegriff.de?
Last seen Oct 2026 · 8 technologies across 7 categories
Hosting panels
Plesk
since May 2022
JavaScript libraries
Programming languages
Security
HSTS
since Jan 2023
UI frameworks
Web servers
Nginx
since May 2022
Widgets
FlexSlider
since May 2022
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 checked
- ai.txt not checked
AI Crawlers
No AI crawlers blocked
Audience
Germany
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.30 / 10 · ranked #1,125,295 of all domains
27 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.6 s |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: German
- Weight: 0.8 MB · 38 requests
- Structured data: JSON-LD, Microdata
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Institut für Mathematisches Lernen
- Industry: Education (declares
School)
From the homepage's own structured data (Oct 2026).
Infrastructure
- Hosted on SNAFU-LIG-AS (213.73.98.12)
- DNS: snafu.de
- Email: snafu.de
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 13,009,549, 2 hosts
- Verified with: Google
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted