What powers 801books.com?
Last seen Aug 2026 · 14 technologies across 11 categories
Advertising
i-mobile
since Jun 2022
Analytics
Cloudflare Browser Insights
since Dec 2025
CDN
Cloudflare
since Jun 2022
CMS
Databases
MySQL
since Jun 2022
Font scripts
Twitter Emoji (Twemoji)
since Jun 2022
JavaScript libraries
LazySizes
since Jun 2022
Miscellaneous
HTTP/3
since Sep 2022
Performance
Priority Hints
since Aug 2023
Programming languages
PHP
since Jun 2022
WordPress plugins
AI Crawlers
Doesn't name any of the 33 AI crawlers we track in its robots.txt. Catch-all rules (User-agent: *) restrict some paths for every crawler, AI or not. Checked Aug 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 87% phone
- 9% tablet
- 4% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
0.94 / 10 · ranked #13,814,692 of all domains
4 referring domains · OpenPageRank
Core Web Vitals
| LCP | 7 s |
| INP | 100 ms |
| CLS | 0.05 |
| TTFB | 4700 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- CDN: Cloudflare
- Weight: 2.5 MB · 91 requests
Homepage as crawled by the HTTP Archive, Aug 2026.
Full technology history →
Report an incorrect detection
Recent changes
- detected i-mobile Jul 2026
- dropped i-mobile May 2026
- detected i-mobile Feb 2026
- detected Cloudflare Browser Insights Dec 2025
- dropped i-mobile Dec 2025
- detected Twitter Emoji (Twemoji) Dec 2025
- dropped Microsoft ASP.NET Nov 2025