udn.com
As of Nov 6, 2026, udn.com's ads.txt lists 6,138 seller lines across 550 ad systems, its robots.txt blocks GPTBot and ClaudeBot, and its DMARC policy is none.
Checked daily since Oct 31, 2026. JSON. Link to this check. Run this site? Remove or correct this report.
Checked Nov 6, 2026, 20:05 UTC
| File | Status | What the robot saw | Same since |
|---|---|---|---|
| ads.txt | REVALIDATED | 6,138 seller lines, 550 ad systems. | 2026-11-03 |
| app-ads.txt | SUCCESS | 61 seller lines, 25 ad systems. | 2026-11-03, first check |
| sellers.json | NOT_FOUND | Not found. The site answered 404. 1,903 lines have no matching seller at 152media.com, 152media.info, 33across.com, 360playvid.com, and 211 more. Evidence 2,293 lines not judged: the ad system's sellers.json could not be read. | 2026-11-05, first check |
| robots.txt | SUCCESS | 4 rules for 4 AI crawlers. Blocks GPTBot and ClaudeBot. Allows Meta-ExternalAgent and Meta-ExternalFetcher. | 2026-11-06, first check |
| llms.txt | NOT_FOUND | Not found. The site answered 404. | 2026-11-06, first check |
| DMARC | SUCCESS | p=none. Reports off. | 2026-11-06, first check |
| MTA-STS | NOT_FOUND | No MTA-STS record. | 2026-11-06, first check |
| BIMI | NOT_FOUND | No BIMI record. | 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.