An IAB Tech Lab standard that lets app publishers declare which ad networks are authorized to sell their inventory.

Where do I put the app-ads.txt file?

At the root of the developer website listed in your App Store / Google Play page, e.g. https://studio.com/app-ads.txt.

What is a Certification Authority ID?

An optional TAG-ID of the ad system, the 4th field of an app-ads.txt record.

g18d4db5d.app-ads-txt.com app-ads.txt check

g18d4db5d.app-ads-txt.com achieves the best ad optimization: its app-ads.txt has no errors and matches what its 4 ad networks expect (100% of 5 lines).

Checked 20 Oct 2026. 29 lines, 29 unique records, 0 duplicates, 0 invalid lines, 4 ad networks detected.

Ad networks in g18d4db5d.app-ads-txt.com/app-ads.txt

Google AdMob — accounts pub-2337822298758831, pub-2561470205289901, pub-2931203390134969 and 5 more: 8 lines in the file
Index Exchange — account 188781: 1 line in the file
OpenX — account 540470997: 1 line in the file
Magnite (Rubicon) — accounts 20680, 20682: 2 lines in the file

Corrected file: g18d4db5d.app-ads-txt.com app-ads.txt (fixed).

FAQ

Does g18d4db5d.app-ads-txt.com have an app-ads.txt?

Yes — https://g18d4db5d.app-ads-txt.com/app-ads.txt has 29 lines (checked 20 Oct 2026).

Which ad networks does g18d4db5d.app-ads-txt.com work with?

Its app-ads.txt lists Google AdMob, Index Exchange, OpenX, Magnite (Rubicon).

Is the app-ads.txt of g18d4db5d.app-ads-txt.com correct?