What powers duelingbook.com?
Last seen Jun 2026 · 17 technologies across 9 categories
Analytics
Google Analytics
since Jun 2018
CDN
Cloudflare
since Apr 2018
JavaScript frameworks
JavaScript libraries
FingerprintJS
since Feb 2019
Maps
Google Maps
since Oct 2018
Miscellaneous
HTTP/3
since Sep 2022
Open Graph
since Sep 2022
Programming languages
PHP
since Aug 2018
Security
Cloudflare Bot Management
since Feb 2022
Cloudflare Turnstile
since Jun 2026
reCAPTCHA
since Apr 2022
Tag managers
Google Tag Manager
since Dec 2021
Audience
- 76% desktop
- 23% phone
- 1% tablet
United States
Germany
United Kingdom
France
Italy
Canada
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
2.42 / 10 · ranked #2,634,272 of all domains
17 referring domains · OpenPageRank
Core Web Vitals
| LCP | 4.2 s |
| INP | 325 ms |
| CLS | 0.3 |
| TTFB | 900 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: English
- CDN: Cloudflare
- Weight: 6.4 MB · 313 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| www.duelingbook.com | 17 |
| forum.duelingbook.com | 7 |
Full technology history →
Report an incorrect detection
Recent changes
- detected Cloudflare Turnstile Jun 2026
- detected Cloudflare Bot Management May 2026
- dropped Cloudflare Bot Management Apr 2026