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.

bell.ca app-ads.txt check

bell.ca achieves the best ad optimization: its app-ads.txt has no errors and matches what its 10 ad networks expect (100% of 26 lines).

Checked 20 Oct 2026. 213 lines, 166 unique records, 15 duplicates, 0 invalid lines, 16 ad networks detected.

Ad networks in bell.ca/app-ads.txt

Google AdMob — account pub-0227480467683561: 1 line in the file
Index Exchange — accounts 183816, 186007, 195741 and 3 more: 6 lines in the file
Magnite (Rubicon) — account 13126: 1 line in the file
PubMatic — accounts 165574, 162039, 165572 and 1 more: 4 lines in the file
TripleLift — account 9110: 1 line in the file
OpenX — accounts 564300276, 540310746, 540303943 and 3 more: 6 lines in the file
Amazon Publisher Services — account 3733: 1 line in the file
Xandr (Microsoft) — account 9610: 1 line in the file
Yahoo — accounts 54894, 56359, 55951 and 1 more: 4 lines in the file
Criteo — account B-060641: 1 line in the file
Mintegral — partner (reseller) lines only: 13 lines in the file, 400 expected lines missing
Liftoff Monetize (Vungle) — partner (reseller) lines only: 10 lines in the file, 380 expected lines missing
Chartboost — partner (reseller) lines only: 12 lines in the file, 400 expected lines missing
Yango Ads — partner (reseller) lines only: 25 lines in the file, 400 expected lines missing
DSP Exchange — partner (reseller) lines only: 10 lines in the file, 400 expected lines missing
Bidmachine — partner (reseller) lines only: 13 lines in the file, 400 expected lines missing

Corrected file: bell.ca app-ads.txt (fixed).

FAQ

Does bell.ca have an app-ads.txt?

Yes — https://bell.ca/app-ads.txt has 213 lines (checked 20 Oct 2026).

Which ad networks does bell.ca work with?

Its app-ads.txt lists Google AdMob, Index Exchange, Magnite (Rubicon), PubMatic, TripleLift, OpenX, Amazon Publisher Services, Xandr (Microsoft), Yahoo, Criteo, Mintegral, Liftoff Monetize (Vungle) and 4 more.

Is the app-ads.txt of bell.ca correct?