What powers 
ssk21.co.jp?
Last seen Aug 2026 · 13 technologies across 10 categories
Advertising
Google Ads
since Dec 2022
Analytics
Google Ads Conversion Tracking
since Aug 2022
Google Analytics
since Oct 2016
JavaScript Frameworks
JavaScript libraries
Operating systems
Windows Server
since Feb 2019
Programming languages
Tag managers
Google Tag Manager
since Jul 2022
Web server extensions
Web Servers
Webmail
Google Workspace
since Aug 2022
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Sep 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
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 robots.txt, all AI crawlers allowed
Audience
- 84% desktop
- 16% phone
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
5.56 / 10 · ranked #152,090 of all domains
154 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.8 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Japanese
- Weight: 2.6 MB · 74 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on INFOSPHERE NTT PC Communications, Inc. (124.146.156.159)
- DNS: Onamae.com
- Email: Google Workspace
- Email security: SPF (soft fail), no DMARC record
- SSL: DigiCert, RSA 2048, expires Mar 2027
- Common Crawl link graph: rank 625,548, 3 hosts
- Verified with: Google
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted