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.

londonbusapp.com app-ads.txt check

londonbusapp.com is missing out on higher CPMs: its app-ads.txt has 3 invalid lines. Buyers' crawlers skip invalid lines, so those sellers can't be verified.

Checked 19 Oct 2026. 4,844 lines, 4,641 unique records, 200 duplicates, 3 invalid lines, 37 ad networks detected.

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

Google AdMob — accounts pub-2842912063229020, pub-6665395092988378: 2 lines in the file
PubMatic — accounts 159856, 158209: 2 lines in the file
Magnite (Rubicon) — accounts 16430, 22322: 2 lines in the file
Ogury — accounts 013dde6a-389f-47cd-a4bc-bf8d20445572, dd8cc204-330a-4598-af59-e0279a910e97: 8 lines in the file, 11 expected lines missing
Index Exchange — accounts 193095, 193097, 579593: 3 lines in the file
AppLovin — account 6ebd11122669cf8d3f1a937c6fce76c1: 36 lines in the file
Criteo — account b-062946: 1 line in the file
Meta Audience Network — accounts 324487721379210, 440980396277497: 2 lines in the file
Vungle — accounts 1048, 68b71eb3d7cac5dae6e2a61f: 361 lines in the file
Yahoo — accounts 55882, 1903762: 2 lines in the file
Amazon Publisher Services — account a0d085ff-1c23-48a7-91b7-efd93069ab05: 1 line in the file
Smaato — accounts 1100044303, 1100024315, 1100056695 and 2 more: 5 lines in the file
InMobi — accounts 8b98b54102af4e5f954909d24a90902e, ed2a20cbd3a843c48c307ee57a3a35d6: 194 lines in the file, 79 expected lines missing
Verve (PubNative) — accounts 1007603, 1008394, 1009372 and 1 more: 400 lines in the file, 46 expected lines missing
DT Exchange (Fyber) — account 209544: 400 lines in the file, 26 expected lines missing
Start.io — account 111963416: 79 lines in the file, 79 expected lines missing
Chartboost — account 6733afe86e5c4726960f9d63: 400 lines in the file, 1 expected line missing
OpenX — account 567176282: 1 line in the file
Mintegral — partner (reseller) lines only: 400 lines in the file, 316 expected lines missing
Unity Ads — partner (reseller) lines only: 82 lines in the file, 78 expected lines missing
ironSource / LevelPlay — partner (reseller) lines only: 74 lines in the file, 51 expected lines missing
Yandex Ads — partner (reseller) lines only: 128 lines in the file, 40 expected lines missing
VK Ads (myTarget) — partner (reseller) lines only: 94 lines in the file, 50 expected lines missing
BIGO Ads — partner (reseller) lines only: 400 lines in the file, 336 expected lines missing
Yango Ads — partner (reseller) lines only: 400 lines in the file, 400 expected lines missing
Bidease — partner (reseller) lines only: 42 lines in the file, 7 expected lines missing
BlueSea — partner (reseller) lines only: 18 lines in the file, 19 expected lines missing
DSP Exchange — partner (reseller) lines only: 321 lines in the file, 240 expected lines missing
Madex — partner (reseller) lines only: 4 lines in the file, 14 expected lines missing
Maticoo (zMaticoo) — partner (reseller) lines only: 205 lines in the file, 239 expected lines missing
Monetrix — partner (reseller) lines only: 43 lines in the file, 50 expected lines missing
Prado — partner (reseller) lines only: 14 lines in the file, 13 expected lines missing
HyprMX — partner (reseller) lines only: 284 lines in the file, 85 expected lines missing
Kidoz — partner (reseller) lines only: 10 lines in the file, 12 expected lines missing
CAS.ai — partner (reseller) lines only: 122 lines in the file, 43 expected lines missing
DSail — partner (reseller) lines only: 122 lines in the file, 43 expected lines missing
Bidmachine — partner (reseller) lines only: 400 lines in the file, 400 expected lines missing

Invalid lines

keenkale,94044,RESELLER,6c1c00b269ccdfa4
adsparc,986,RESELLER
singularads,895023,RESELLER

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

FAQ

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

Yes — https://londonbusapp.com/app-ads.txt has 4,844 lines (checked 19 Oct 2026).

Which ad networks does londonbusapp.com work with?

Its app-ads.txt lists Google AdMob, PubMatic, Magnite (Rubicon), Ogury, Index Exchange, AppLovin, Criteo, Meta Audience Network, Vungle, Yahoo, Amazon Publisher Services, Smaato and 25 more.

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