leitner-box.com
leitner-box.com is a live English-language website hosted on Cloudflare, Inc. (AS13335) in the United States, served by Cloudflare. cl0q first saw it on 2026-08-26 and last crawled it on 2026-08-26. It resolves to 104.21.57.198 and has mail (MX) records set up. Its favicon is fingerprinted by SHA-256, so you can find every other site that serves the same icon.
How the site describes itself:
Leitner Box Flashcards Mobile App - the Power of Spaced Repetitions
Leitner System is a magical technique that helps you learn and remember information by spacing out your practice sessions strategically.
| Status | 200 OK — live & indexed by cl0q |
|---|---|
| First seen | 2026-08-26 |
| Last crawled | 2026-08-26 |
| IPv4 | 104.21.57.198 |
| IPv6 | 2606:4700:3035::ac43:c02c |
| Network | AS13335 Cloudflare, Inc. · United States |
| Mail (MX) | mail.protonmail.ch,mailsec.protonmail.ch |
| Language | en-US |
| Server | cloudflare |
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