What powers dc21.co.jp?
Last seen Jun 2026 · 18 technologies across 12 categories
Advertising
Twitter Ads
since Oct 2022
Analytics
Google Analytics
since Oct 2022
Authentication
Facebook Login
since Oct 2022
CDN
Cloudflare
since Mar 2025
jQuery CDN
since Oct 2022
JavaScript libraries
Slick
since Oct 2022
Miscellaneous
Open Graph
since Mar 2025
Operating systems
UNIX
since Oct 2022
Programming languages
Security
Cloudflare Bot Management
since Mar 2025
Web server extensions
Web servers
Widgets
Twitter
since Oct 2022
Audience
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
0.92 / 10 · ranked #14,274,041 of all domains
1 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.2 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 1100 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese
- Weight: 4.1 MB · 90 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Jul 2026.
Full technology history →
Report an incorrect detection
Recent changes
- detected Cloudflare May 2026
- detected Cloudflare Bot Management May 2026
- dropped Google Font API Feb 2026
- dropped Cloudflare Nov 2025
- dropped Cloudflare Bot Management Nov 2025