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.

newsday.com app-ads.txt check

newsday.com achieves the best ad optimization: its app-ads.txt has no errors and matches what its 11 ad networks expect (100% of 21 lines).

Checked 20 Oct 2026. 273 lines, 202 unique records, 2 duplicates, 0 invalid lines, 13 ad networks detected.

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

Google AdMob — accounts pub-1774351447051969, pub-9854863758935661: 2 lines in the file
OpenX — accounts 539141867, 543484257, 539446002: 3 lines in the file
Index Exchange — accounts 185538, 193933, 186152 and 1 more: 4 lines in the file
Xandr (Microsoft) — account 3653: 1 line in the file
Magnite (Rubicon) — account 11980: 1 line in the file
Meta Audience Network — account 147686468041: 1 line in the file
Sovrn — accounts 252025, 252025-eb: 2 lines in the file
PubMatic — accounts 162997, 161054: 2 lines in the file
Amazon Publisher Services — account 2e94e95b-2999-474e-b392-8078df970b76: 1 line in the file
TripleLift — accounts 4043, 4043-EB: 2 lines in the file
Yahoo — accounts 56782, 57463, 289: 3 lines in the file
Mintegral — partner (reseller) lines only: 11 lines in the file, 400 expected lines missing
Yango Ads — partner (reseller) lines only: 20 lines in the file, 400 expected lines missing

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

FAQ

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

Yes — https://newsday.com/app-ads.txt has 273 lines (checked 20 Oct 2026).

Which ad networks does newsday.com work with?

Its app-ads.txt lists Google AdMob, OpenX, Index Exchange, Xandr (Microsoft), Magnite (Rubicon), Meta Audience Network, Sovrn, PubMatic, Amazon Publisher Services, TripleLift, Yahoo, Mintegral and 1 more.

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