What powers sliderule.ca?
Last seen Aug 2026 · 2 technologies across 2 categories
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
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.24 / 10 · ranked #1,209,846 of all domains
34 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.5 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Weight: 0.1 MB · 18 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on VDC (69.27.102.6)
- Email: sliderule.ca
- Email security: no SPF record, no DMARC record
- SSL: Let's Encrypt, RSA 2048, wildcard, expires Nov 2026
- Common Crawl link graph: rank 538,432, 2 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Full technology history →
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Recent changes
- dropped Cloudflare Mar 2026
- dropped Cloudflare Bot Management Mar 2026
- detected Cloudflare Nov 2025
- detected Cloudflare Bot Management Nov 2025