What powers 
s-book.net?
Last seen Aug 2026 · 7 technologies across 7 categories
Analytics
Google Analytics
since Jun 2018
CDN
Google Hosted Libraries
since Aug 2022
Font scripts
JavaScript libraries
PaaS
Amazon Web Services
since Sep 2024
Security
HSTS
since Sep 2022
Web servers
Apache HTTP Server
since Aug 2022
AI Crawlers
Blocks all crawlers by default in robots.txt (User-agent: *). Checked Sep 2026.
- robots.txt found
- llms.txt not checked
- ai.txt not checked
AI Crawlers
All crawlers blocked
Audience
- 83% desktop
- 12% phone
- 5% tablet
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.07 / 10 · ranked #522,385 of all domains
138 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.6 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Weight: 0.3 MB · 11 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on ODN SoftBank Corp. (210.236.234.144)
- DNS: Amazon Route 53
- Email: hitotsubashi.org
- Email security: SPF (soft fail), no DMARC record
- SSL: JPRS, RSA 2048, expires Feb 2027
- Common Crawl link graph: rank 684,510, 2 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.sun.s-book.net | 7 |
| www.s-book.net | 6 |