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.

20m.es app-ads.txt check

20m.es achieves the best ad optimization: its app-ads.txt has no errors and matches what its 10 ad networks expect (100% of 22 lines).

Checked 20 Oct 2026. 140 lines, 133 unique records, 2 duplicates, 0 invalid lines, 14 ad networks detected.

Ad networks in 20m.es/app-ads.txt

Google AdMob — accounts pub-3840896709880083, pub-3117709661232544: 2 lines in the file
OpenX — accounts 540233838, 537149888, 540919266: 3 lines in the file
PubMatic — accounts 156439, 154037, 157799 and 2 more: 5 lines in the file
Magnite (Rubicon) — accounts 16114, 19198, 17212: 3 lines in the file
Xandr (Microsoft) — account 3703: 1 line in the file
Smaato — account 1100044045: 1 line in the file
Index Exchange — accounts 188211, 194766, 194931: 3 lines in the file
Sovrn — accounts 270110, 270110-eb: 2 lines in the file
Amazon Publisher Services — accounts cc894591-e5e0-4c76-ac55-0935de6b4036, 3661: 2 lines in the file
TripleLift — account 7605: 1 line in the file
Mintegral — partner (reseller) lines only: 26 lines in the file, 400 expected lines missing
Yango Ads — partner (reseller) lines only: 35 lines in the file, 400 expected lines missing
DSP Exchange — partner (reseller) lines only: 14 lines in the file, 400 expected lines missing
Bidmachine — partner (reseller) lines only: 14 lines in the file, 400 expected lines missing

Corrected file: 20m.es app-ads.txt (fixed).

FAQ

Does 20m.es have an app-ads.txt?

Yes — https://20m.es/app-ads.txt has 140 lines (checked 20 Oct 2026).

Which ad networks does 20m.es work with?

Its app-ads.txt lists Google AdMob, OpenX, PubMatic, Magnite (Rubicon), Xandr (Microsoft), Smaato, Index Exchange, Sovrn, Amazon Publisher Services, TripleLift, Mintegral, Yango Ads and 2 more.

Is the app-ads.txt of 20m.es correct?