What powers flashcardlab.co?
Last seen Oct 2026 · 19 technologies across 15 categories
Advertising
Google AdSense
since Sep 2023
Analytics
Google Analytics
since Sep 2023
Authentication
NextAuth.js
since Aug 2025
CRM
Zoho
since Mar 2026
Font scripts
Google Font API
since Dec 2024
JavaScript frameworks
JavaScript libraries
Howler.js
since Aug 2025
Miscellaneous
Operating systems
Ubuntu
since Sep 2023
Payment processors
Performance
Priority Hints
since Oct 2026
Programming languages
Node.js
since Sep 2023
Security
reCAPTCHA
since Sep 2023
UI frameworks
MUI
since Sep 2023
Web servers
AI Crawlers
Doesn't name any of the 33 AI crawlers we track in its robots.txt. Catch-all rules (User-agent: *) restrict some paths for every crawler, AI or not. Checked Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
1.58 / 10 · ranked #5,799,036 of all domains
2 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.6 s |
| INP | 75 ms |
| CLS | 0.05 |
| TTFB | 800 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Weight: 2.9 MB · 75 requests
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on DigitalOcean (68.183.129.52)
- DNS: DigitalOcean
- Email: Zoho Mail
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 349,237
- Verified with: Google, Zoho
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted