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.

foxsports.com app-ads.txt check

foxsports.com achieves the best ad optimization: its app-ads.txt has no errors and matches what its 11 ad networks expect (100% of 37 lines).

Checked 20 Oct 2026. 287 lines, 181 unique records, 2 duplicates, 0 invalid lines, 11 ad networks detected.

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

Amazon Publisher Services — accounts d9e29e5f-02b1-4959-8da3-c786e6a2421b, eedcd27e-b489-4115-9af2-918ff235e29d, bc84bdd5-417c-4e42-abbc-3dd348d5cf57 and 4 more: 7 lines in the file
Xandr (Microsoft) — accounts 13765, 9917, 16864 and 2 more: 5 lines in the file
Criteo — accounts 146785, B-051027: 2 lines in the file
Google AdMob — accounts pub-9095468986860540, pub-5869277305859865, pub-7618761136931340 and 4 more: 7 lines in the file
Index Exchange — accounts 206103, 201520, 201389 and 2 more: 5 lines in the file
Smaato — account 1100054264: 1 line in the file
OpenX — accounts 537149888, 559105323, 559272740 and 2 more: 5 lines in the file
PubMatic — accounts 161618, 162979, 165928 and 1 more: 4 lines in the file
TripleLift — accounts 13922, 14213: 2 lines in the file
Yahoo — accounts 100002, 57974, 59965: 3 lines in the file
Magnite (Rubicon) — accounts 13000, 24848: 2 lines in the file

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

FAQ

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

Yes — https://foxsports.com/app-ads.txt has 287 lines (checked 20 Oct 2026).

Which ad networks does foxsports.com work with?

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

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