What powers 
radio21.de?
Last seen Oct 2026 · 33 technologies across 19 categories
Analytics
CDN
CMS
Cookie compliance
Customer data platform
Font scripts
JavaScript frameworks
JavaScript libraries
Live chat
Miscellaneous
PaaS
Programming languages
Tag managers
UI frameworks
Video players
Web servers
Webmail
Widgets
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. A recent check saw a policy file missing; awaiting confirmation.
- robots.txt found
- llms.txt not found
- ai.txt not found
- Oct 2026 robots.txt appeared
- Oct 2026 * added to robots.txt
- Oct 2026 * removed from robots.txt
- Oct 2026 robots.txt removed
- Sep 2026 *: Restricted (was Allowed)
- Aug 2026 *: Allowed (was Restricted)
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| 21online | #50 | 4 |
| die toten hosen | #60 | 2 |
| radio 21 | #1 | 1 |
| rock and pop | #43 | 1 |
| 87.7 playlist | #57 | 1 |
| pop stream | #57 | 1 |
| radio rammstein | #59 | 1 |
| slipknot sid mask | #61 | 1 |
| radio rock | #67 | 1 |
| ham n eggers | #73 | 1 |
| slash myles kennedy songs | #73 | 1 |
| 87.7 live radio | #84 | 1 |
| radio niedersachsen | #21 | 0 |
| radio 21 fm live | #23 | 0 |
| deutschland fm radio | #30 | 0 |
| rock the 21 | #30 | 0 |
| radio germany live | #31 | 0 |
| internet radio germany | #32 | 0 |
| soft rock nonstop | #32 | 0 |
| bei rock | #33 | 0 |
| top111 | #34 | 0 |
| live german radio | #35 | 0 |
| radio german online | #35 | 0 |
| rock n pop | #37 | 0 |
| 104.1 the wolf listen live | #40 | 0 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
AI Crawlers
No AI crawlers blocked
Audience
- 81% phone
- 17% desktop
- 2% tablet
Germany
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
5.09 / 10 · ranked #238,437 of all domains
127 referring domains · OpenPageRank
Search traffic
16 est. monthly organic visits (US)
87 keywords in Google's top 30
Core Web Vitals
| LCP | 1.7 s |
| INP | 100 ms |
| CLS | 0.1 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English (United States)
- Weight: 2.6 MB · 56 requests
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Radio 21
- Country: Germany
From Wikidata (CC0).
Infrastructure
- Hosted on Hetzner (136.243.167.145)
- DNS: nsdns.info
- Email: sophos.com
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Sectigo, RSA 2048, wildcard, expires Dec 2026
- Common Crawl link graph: rank 773,806, 10 hosts
- Verified with: Apple Business, Google, Microsoft 365, Sophos
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| player.radio21.de | 18 |
| www.radio21.de | 15 |
| nrw.radio21.de | 14 |
Full technology history →
Report an incorrect detection
Recent changes
- detected Apple iCloud Mail Sep 2026
- detected Htmx Jul 2026