duolingo.com
As of Nov 9, 2026, duolingo.com's ads.txt lists 1 seller line across 1 ad system and its DMARC policy is reject.
Checked daily since Oct 31, 2026. JSON. Link to this check. Run this site? Remove or correct this report.
Checked Nov 9, 2026, 21:50 UTC
| File | Status | What the robot saw | Same since |
|---|---|---|---|
| ads.txt | REVALIDATED | 1 seller line, 1 ad system. | 2026-11-03 |
| app-ads.txt | SUCCESS | 98 seller lines, 37 ad systems. | 2026-11-03, first check |
| sellers.json | INCOMPLETE | Only partly read. No changes come from it. No good check yet. 1 line has no matching seller at google.com. | |
| robots.txt | SUCCESS | Read. No rule names an AI crawler. | 2026-11-06, first check |
| llms.txt | INCOMPLETE | Only partly read. No changes come from it. No good check yet. | |
| DMARC | SUCCESS | p=reject. Reports on. | 2026-11-06, first check |
| MTA-STS | UNAVAILABLE | The check failed. No good check yet. UNAVAILABLE, NOT AN ABSENCE | |
| BIMI | SUCCESS | Logo record published. | 2026-11-06, first check |
| security.txt | NOT_FOUND | Not found. The site answered 404. | 2026-11-06, first check |
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These are the site's own public files, as fetched, with the date. The robot reports what is published. It does not judge compliance, approval, or intent. A failed fetch is a failed fetch, never a missing file.
Not checked: anything behind a login, account settings, or private feeds. Whether crawlers obey robots.txt. Business deals: a file line is not a contract.
Changed today
| fasttvltd.com | REMOVED | Dropped sellers.json seller: e0badc16 | 00:30 UTC |
| fasttvltd.com | REMOVED | Dropped sellers.json seller: d9a9ab64 | 00:30 UTC |
| fasttvltd.com | REMOVED | Dropped sellers.json seller: ad58afeb | 00:30 UTC |
| fasttvltd.com | REMOVED | Dropped sellers.json seller: 9358ba90 | 00:30 UTC |