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.

skyradio.nl app-ads.txt check

skyradio.nl is missing out on higher CPMs: its app-ads.txt has 6 invalid lines. Buyers' crawlers skip invalid lines, so those sellers can't be verified.

Checked 20 Oct 2026. 171 lines, 132 unique records, 2 duplicates, 6 invalid lines, 6 ad networks detected.

Ad networks in skyradio.nl/app-ads.txt

Xandr (Microsoft) — accounts 7463, 9302, 9994 and 4 more: 7 lines in the file
Google AdMob — accounts pub-5443109342713637, pub-5854238349292660, pub-1088068438510765: 3 lines in the file
Index Exchange — accounts 184476, 188249: 2 lines in the file
Magnite (Rubicon) — account 12108: 1 line in the file
PubMatic — accounts 162544, 160813, 161079 and 1 more: 4 lines in the file
Criteo — accounts B-060835, B-059589: 2 lines in the file

Invalid lines

ownerdomain, dpgmedia.nl, DIRECT
adswizz.com, QmusicNL_Top 40, DIRECT
adswizz.com, QmusicNL_Fout Uur, DIRECT
adswizz.com, QmusicNL_90s 00s, DIRECT
adswizz.com, One World Radio, DIRECT
adswizz.com, Qmusic Limburg, DIRECT

Corrected file: skyradio.nl app-ads.txt (fixed).

FAQ

Does skyradio.nl have an app-ads.txt?

Yes — https://skyradio.nl/app-ads.txt has 171 lines (checked 20 Oct 2026).

Which ad networks does skyradio.nl work with?

Its app-ads.txt lists Xandr (Microsoft), Google AdMob, Index Exchange, Magnite (Rubicon), PubMatic, Criteo.

Is the app-ads.txt of skyradio.nl correct?