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.

thisoldhouse.com app-ads.txt check

thisoldhouse.com is missing out on higher CPMs: its app-ads.txt has 2 invalid lines. Buyers' crawlers skip invalid lines, so those sellers can't be verified.

Checked 20 Oct 2026. 142 lines, 120 unique records, 20 duplicates, 2 invalid lines, 10 ad networks detected.

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

Yahoo — accounts 57007, 59158, 59120: 3 lines in the file
PubMatic — accounts 159292, 159293, 157898: 3 lines in the file
Xandr (Microsoft) — accounts 11429, 12535, 9538: 3 lines in the file
Magnite (Rubicon) — accounts 13702, 15926: 2 lines in the file
Index Exchange — accounts 185104, 191387, 192671 and 1 more: 4 lines in the file
TripleLift — accounts 9107, 9789, 9065 and 1 more: 4 lines in the file
Smaato — accounts 1100048155, 1100004890: 2 lines in the file
Google AdMob — accounts pub-8674340505315230, pub-4770346047043508: 2 lines in the file
Mintegral — partner (reseller) lines only: 11 lines in the file, 400 expected lines missing
Yango Ads — partner (reseller) lines only: 14 lines in the file, 400 expected lines missing

Invalid lines

Magnite Streaming
4vb92-msp9w

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

FAQ

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

Yes — https://thisoldhouse.com/app-ads.txt has 142 lines (checked 20 Oct 2026).

Which ad networks does thisoldhouse.com work with?

Its app-ads.txt lists Yahoo, PubMatic, Xandr (Microsoft), Magnite (Rubicon), Index Exchange, TripleLift, Smaato, Google AdMob, Mintegral, Yango Ads.

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