What powers itbook.info?
Last seen Apr 2026 · 14 technologies across 12 categories
Advertising Networks
Google AdSense
since Jan 2016
Analytics
Google Analytics
since Feb 2018
CDN
Google Hosted Libraries
since Feb 2022
Cookie compliance
Funding Choices
since Sep 2023
Font Scripts
Google Font API
since Aug 2020
JavaScript Frameworks
Miscellaneous
Open Graph
since Sep 2022
RSS
since Dec 2022
Programming languages
Security
reCAPTCHA
since Apr 2022
Tag managers
Google Tag Manager
since Jun 2018
Web Frameworks
Web Servers
Nginx
since Jan 2016
AI Crawlers
robots.txt could not be read at the last check (Sep 2026), so its policy is unknown.
- robots.txt not checked
- llms.txt not checked
- ai.txt not checked
AI Crawlers
Policy unknown
Audience
- 100% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.31 / 10 · ranked #2,860,340 of all domains
25 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.3 s |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Infrastructure
- Hosted on Sakura Internet (160.16.223.15)
- DNS: eNom
- Email: Sakura Internet
- Email security: SPF (neutral), no DMARC record
- Common Crawl link graph: rank 3,063,604, 2 hosts
DNS records as swept Sep 2026. How the web is hosted
Full technology history →
Report an incorrect detection
Recent changes
- detected Google Font API Nov 2025