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.

eltern.de app-ads.txt check

eltern.de achieves the best ad optimization: its app-ads.txt has no errors and matches what its 6 ad networks expect (100% of 10 lines).

Checked 19 Oct 2026. 302 lines, 293 unique records, 9 duplicates, 0 invalid lines, 12 ad networks detected.

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

Amazon Publisher Services — accounts 3493, 7071406c-0ffd-423e-87e5-da06d18c5cc9: 2 lines in the file
Google AdMob — accounts pub-9519890336884096, pub-7178460965706644: 2 lines in the file
OpenX — account 539902333: 1 line in the file
Magnite (Rubicon) — accounts 21958, 23864, 23866 and 1 more: 4 lines in the file
PubMatic — account 161364: 1 line in the file
Index Exchange — account 210574: 1 line in the file
Mintegral — partner (reseller) lines only: 15 lines in the file, 400 expected lines missing
Chartboost — partner (reseller) lines only: 11 lines in the file, 400 expected lines missing
BIGO Ads — partner (reseller) lines only: 11 lines in the file, 400 expected lines missing
Yango Ads — partner (reseller) lines only: 33 lines in the file, 400 expected lines missing
DSP Exchange — partner (reseller) lines only: 15 lines in the file, 400 expected lines missing
Bidmachine — partner (reseller) lines only: 20 lines in the file, 400 expected lines missing

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

FAQ

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

Yes — https://eltern.de/app-ads.txt has 302 lines (checked 19 Oct 2026).

Which ad networks does eltern.de work with?

Its app-ads.txt lists Amazon Publisher Services, Google AdMob, OpenX, Magnite (Rubicon), PubMatic, Index Exchange, Mintegral, Chartboost, BIGO Ads, Yango Ads, DSP Exchange, Bidmachine.

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