nikkeibp.co.jp
As of Nov 9, 2026, nikkeibp.co.jp's ads.txt lists 529 seller lines across 121 ad systems, its robots.txt blocks GPTBot, OAI-SearchBot, ChatGPT-User, ClaudeBot, and 12 more, 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 9, 2026, 22:06 UTC
| File | Status | What the robot saw | Same since |
|---|---|---|---|
| ads.txt | REVALIDATED | 529 seller lines, 121 ad systems. | 2026-11-03 |
| app-ads.txt | NOT_FOUND | Not found. The site answered 404. | 2026-11-03, first check |
| sellers.json | NOT_FOUND | Not found. The site answered 404. 102 lines have no matching seller at acd.op.hicloud.com, adcolony.com, admanmedia.com, admixer.com, and 35 more. Evidence 238 lines not judged: the ad system's sellers.json could not be read. | 2026-11-05, first check |
| robots.txt | SUCCESS | 24 rules for 16 AI crawlers. Blocks GPTBot, OAI-SearchBot, ChatGPT-User, ClaudeBot, and 12 more. | 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 on. | 2026-11-06, first check |
| MTA-STS | UNAVAILABLE | Name did not resolve. 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 |
Sell to publishers like this one? Publisher Watch tells you when any of 8,118 publishers adds or drops an ad seller.
See Publisher Watch
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.