What powers seiryo-hs.jp?
Last seen May 2026 · 12 technologies across 9 categories
Analytics
Google Analytics
since Jan 2019
CDN
Google Hosted Libraries
since Feb 2022
JavaScript libraries
Slick
since Jan 2019
Maps
Google Maps
since Feb 2021
Miscellaneous
PWA
since Aug 2022
Tag managers
Google Tag Manager
since Sep 2024
Video players
YouTube
since Jan 2019
Web servers
Apache HTTP Server
since Jan 2019
Webmail
Apple iCloud Mail
since Jan 2023
AI Crawlers
robots.txt could not be read at the last check (Oct 2026), so its policy is unknown.
- robots.txt not checked
- llms.txt not checked
- ai.txt not checked
AI Crawlers
Policy unknown
Audience
- 73% phone
- 27% desktop
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.21 / 10 · ranked #1,255,914 of all domains
23 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 200 ms |
Real user p75, Chrome UX Report, Oct 2026.
Organisation
- Seiryo High School
- Founded: 1962
- Country: Japan
From Wikidata (CC0).
Infrastructure
- Hosted on SEIRYO INAOKI EDUCATIONAL INSTITUTION (202.244.85.1)
- DNS: htcn.ne.jp
- Email: no MX record returned
- Email security: SPF (soft fail), DMARC monitor only
- Common Crawl link graph: rank 3,314,463, 2 hosts
- Verified with: Apple Business, Microsoft 365
DNS records as swept Oct 2026. How the web is hosted