What powers norbert-roettgen.de?
Last seen Oct 2026 · 9 technologies across 8 categories
Analytics
Matomo Analytics
since Dec 2020
Authentication
Facebook Login
since Oct 2021
CMS
Hosting
Drupal Multisite
since Apr 2022
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
Programming languages
PHP
since Apr 2020
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 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
3.26 / 10 · ranked #1,182,146 of all domains
38 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.1 s |
| INP | 50 ms |
| CLS | 0.4 |
| TTFB | 1300 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: German
- Weight: 5.4 MB · 87 requests
- Structured data: Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on Deutsche Telekom (193.219.105.54)
- DNS: cdu.de
- Email: cdu.de
- Email security: no SPF record, no DMARC record
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 1,253,237, 2 hosts
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted