What powers c21-sh.com?
Last seen Jun 2026 · 24 technologies across 16 categories
Analytics
Google Analytics
since Jul 2019
Microsoft Clarity
since Dec 2023
CDN
cdnjs
since Dec 2021
Cloudflare
since May 2022
CMS
WordPress
since Jul 2019
Databases
MySQL
since Jul 2019
Font scripts
Google Font API
since Mar 2023
JavaScript frameworks
React
since Jul 2025
JavaScript libraries
Maps
Google Maps
since Feb 2021
Miscellaneous
Open Graph
since Mar 2023
Performance
Priority Hints
since Oct 2025
Programming languages
Security
reCAPTCHA
since Jun 2025
Tag managers
Google Tag Manager
since Jul 2019
Web servers
Apache HTTP Server
since Jul 2019
Widgets
Elfsight
since Jul 2025
WordPress plugins
Audience
- 68% phone
- 32% desktop
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
0.96 / 10 · ranked #13,402,443 of all domains
5 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.3 s |
| INP | 75 ms |
| CLS | 0.45 |
| TTFB | 1100 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese
- Weight: 22.3 MB · 194 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.
Full technology history →
Report an incorrect detection
Recent changes
- detected React Jun 2026
- detected styled-components Jun 2026
- detected Priority Hints Oct 2025
- dropped React Sep 2025
- dropped styled-components Sep 2025