What powers 
senioren-union.de?
Last seen Aug 2026 · 6 technologies across 6 categories
CMS
Hosting
Drupal Multisite
since Aug 2022
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
Programming languages
PHP
since Aug 2022
Security
HSTS
since Sep 2022
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 checked
- ai.txt not checked
AI Crawlers
No AI crawlers blocked
Audience
- 70% phone
- 30% desktop
Germany
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.09 / 10 · ranked #510,354 of all domains
54 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.3 s |
| CLS | 0 |
| TTFB | 1600 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: German
- Weight: 3.8 MB · 147 requests
- Structured data: Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Senioren-Union
- Founded: 1988
- Country: Germany
From Wikidata (CC0).
Infrastructure
- Hosted on Deutsche Telekom (193.219.105.53)
- DNS: cdu.de
- Email: cdu.de
- Email security: SPF (hard fail), DMARC monitor only
- SSL: Let's Encrypt, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 11,340,991, 3 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted