What powers vortex-pit.jp?
Last seen Oct 2026 · 6 technologies across 5 categories
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
Operating systems
Windows Server
since Jun 2021
Web frameworks
Microsoft ASP.NET
since Jun 2021
Web servers
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
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
0.45 / 10 · ranked #30,113,906 of all domains
0 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.1 s |
| INP | 250 ms |
| CLS | 0 |
| TTFB | 200 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Japanese (Japan)
- Weight: 0.9 MB · 49 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on INFOSPHERE NTT PC Communications, Inc. (219.118.71.44)
- DNS: linkclub.jp
- Email: linkclub.jp
- Email security: SPF (soft fail), no DMARC record
- Common Crawl link graph: rank 84,519,828
DNS records as swept Oct 2026. How the web is hosted