What powers duell.jp?
Last seen Oct 2026 · 17 technologies across 14 categories
Advertising
Twitter Ads
since Jul 2021
Analytics
Google Analytics
since Mar 2020
Authentication
Facebook Login
since Jul 2021
CDN
Cloudflare
since Mar 2025
Font scripts
Font Awesome
since Mar 2020
Google Font API
since Mar 2020
Hosting
Xserver
since Aug 2022
JavaScript libraries
Programming languages
PHP
since Sep 2021
Security
Cloudflare Bot Management
since Mar 2025
UI frameworks
Bootstrap
since Mar 2020
Video players
YouTube
since Mar 2020
Web frameworks
CodeIgniter
since Sep 2021
Web servers
Nginx
since Mar 2020
Widgets
Twitter
since Mar 2020
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Oct 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
- 58% phone
- 42% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
1.89 / 10 · ranked #3,900,500 of all domains
7 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.3 s |
| CLS | 0 |
Real user p75, Chrome UX Report, Oct 2026.
Page
- Language: English (United States)
- Weight: 5.7 MB · 109 requests
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on Xserver (202.226.37.161)
- DNS: Xserver
- Email: duell.jp
- Email security: SPF (soft fail), no DMARC record
- SSL: Let's Encrypt, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 27,396,888, 2 hosts
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.duell.jp | 17 |
| duell.jp | 15 |
Full technology history →
Report an incorrect detection
Recent changes
- detected Cloudflare May 2026
- detected Cloudflare Bot Management May 2026