What powers 
sendai-eco.ac.jp?
Last seen Aug 2026 · 21 technologies across 12 categories
Advertising
Google Ads
since Dec 2022
Twitter Ads
since Jun 2021
Analytics
Google Ads Conversion Tracking
since Jul 2021
Google Analytics
since Jan 2019
CDN
JavaScript libraries
Maps
Google Maps
since Dec 2022
Miscellaneous
Open Graph
since Apr 2026
Performance
Priority Hints
since Mar 2026
Security
Cloudflare Bot Management
since Sep 2024
Tag managers
Google Tag Manager
since Jan 2019
UI frameworks
Video players
YouTube
since Jan 2019
Web servers
Apache HTTP Server
since Jan 2019
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
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
- 72% phone
- 28% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.78 / 10 · ranked #726,421 of all domains
43 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2 s |
| INP | 100 ms |
| CLS | 0 |
| TTFB | 900 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Weight: 17.2 MB · 366 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Industry: Education (declares
School)
From the homepage's own structured data (Sep 2026).
Infrastructure
- Hosted on OPTAGE OPTAGE Inc. (103.199.133.110)
- DNS: d-53.info
- Email: Google Workspace
- Email security: no SPF record, DMARC monitor only
- SSL: JPRS, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 9,915,909, 2 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Full technology history →
Report an incorrect detection
Recent changes
- detected Cloudflare Bot Management May 2026
- dropped Font Awesome May 2026
- dropped jsDelivr May 2026
- dropped Lodash May 2026
- detected cdnjs Apr 2026
- detected Cloudflare Apr 2026
- detected jQuery CDN Apr 2026
- detected Open Graph Apr 2026
- detected Slick Apr 2026
- detected Swiper Apr 2026
- detected Unpkg Apr 2026
- detected Priority Hints Mar 2026
- dropped Cloudflare Nov 2025
- dropped Cloudflare Bot Management Nov 2025
- dropped Twitter Nov 2025