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.

citytv.com app-ads.txt check

citytv.com achieves the best ad optimization: its app-ads.txt has no errors and matches what its 8 ad networks expect (100% of 17 lines).

Checked 21 Oct 2026. 246 lines, 197 unique records, 6 duplicates, 0 invalid lines, 20 ad networks detected.

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

Google AdMob — accounts pub-0942427266003794, pub-4586415728471297, pub-8584156348842922: 3 lines in the file
Xandr (Microsoft) — accounts 1321, 2579: 2 lines in the file
Index Exchange — accounts 184315, 184601, 209817 and 1 more: 4 lines in the file
Amazon Publisher Services — account 3719: 1 line in the file
OpenX — accounts 539462051, 539708628, 540302365: 3 lines in the file
Magnite (Rubicon) — accounts 25664, 25666, 23716: 3 lines in the file
PubMatic — account 163543: 1 line in the file
Sovrn — accounts 543402, 543402-eb: 2 lines in the file
Mintegral — partner (reseller) lines only: 43 lines in the file, 400 expected lines missing
Liftoff Monetize (Vungle) — partner (reseller) lines only: 21 lines in the file, 369 expected lines missing
Chartboost — partner (reseller) lines only: 42 lines in the file, 400 expected lines missing
InMobi — partner (reseller) lines only: 17 lines in the file, 254 expected lines missing
DT Exchange (Fyber) — partner (reseller) lines only: 20 lines in the file, 400 expected lines missing
BIGO Ads — partner (reseller) lines only: 33 lines in the file, 400 expected lines missing
Yango Ads — partner (reseller) lines only: 86 lines in the file, 400 expected lines missing
DSP Exchange — partner (reseller) lines only: 44 lines in the file, 400 expected lines missing
Maticoo (zMaticoo) — partner (reseller) lines only: 18 lines in the file, 400 expected lines missing
Verve (PubNative) — partner (reseller) lines only: 30 lines in the file, 400 expected lines missing
HyprMX — partner (reseller) lines only: 20 lines in the file, 349 expected lines missing
Bidmachine — partner (reseller) lines only: 56 lines in the file, 400 expected lines missing

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

FAQ

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

Yes — https://citytv.com/app-ads.txt has 246 lines (checked 21 Oct 2026).

Which ad networks does citytv.com work with?

Its app-ads.txt lists Google AdMob, Xandr (Microsoft), Index Exchange, Amazon Publisher Services, OpenX, Magnite (Rubicon), PubMatic, Sovrn, Mintegral, Liftoff Monetize (Vungle), Chartboost, InMobi and 8 more.

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