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.

mobile.de app-ads.txt check

mobile.de achieves the best ad optimization: its app-ads.txt has no errors and matches what its 10 ad networks expect (100% of 23 lines).

Checked 20 Oct 2026. 96 lines, 62 unique records, 4 duplicates, 0 invalid lines, 10 ad networks detected.

Ad networks in mobile.de/app-ads.txt

Xandr (Microsoft) — account 7449: 1 line in the file
Amazon Publisher Services — account 9191b4c5-bd27-48fb-b2c4-37ef56caf844: 1 line in the file
Criteo — account B-059189: 1 line in the file
Google AdMob — accounts pub-5773754360977056, pub-6322191135550375: 2 lines in the file
Index Exchange — accounts 185465, 188302, 199185: 3 lines in the file
OpenX — accounts 537149403, 540310762, 557070574: 3 lines in the file
PubMatic — accounts 90485, 157539, 161820: 3 lines in the file
Magnite (Rubicon) — accounts 10812, 11462, 19742: 3 lines in the file
Smaato — accounts 1100042145, 1100004890: 2 lines in the file
TripleLift — accounts 8054, 8054-EB, 5001 and 2 more: 5 lines in the file

Corrected file: mobile.de app-ads.txt (fixed).

FAQ

Does mobile.de have an app-ads.txt?

Yes — https://mobile.de/app-ads.txt has 96 lines (checked 20 Oct 2026).

Which ad networks does mobile.de work with?

Its app-ads.txt lists Xandr (Microsoft), Amazon Publisher Services, Criteo, Google AdMob, Index Exchange, OpenX, PubMatic, Magnite (Rubicon), Smaato, TripleLift.

Is the app-ads.txt of mobile.de correct?