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.

los40.com app-ads.txt check

los40.com is missing out on higher CPMs: its app-ads.txt has 4 invalid lines and lists only 181 of the 336 lines its 14 ad networks expect (46% missing). Unlisted sellers can't be verified, so buyers bid less or skip the inventory.

Checked 19 Oct 2026. 2,104 lines, 1,998 unique records, 88 duplicates, 4 invalid lines, 32 ad networks detected.

Ad networks in los40.com/app-ads.txt

Xandr (Microsoft) — accounts 10535, 2579, 12439 and 16 more: 19 lines in the file
Amazon Publisher Services — accounts 3226, 5107, 5123 and 7 more: 10 lines in the file
Criteo — accounts B-058521, B-062612, B-060927 and 3 more: 6 lines in the file
Google AdMob — accounts pub-8750086020675820, pub-1305372857617183, pub-1309378188566785 and 32 more: 35 lines in the file
Index Exchange — accounts 185132, 185484, 215576 and 16 more: 19 lines in the file
PubMatic — accounts 157987, 161200, 161830 and 17 more: 20 lines in the file
Magnite (Rubicon) — accounts 9778, 16114, 13510 and 16 more: 19 lines in the file
TripleLift — accounts 13044, 13044-EB, 7057 and 4 more: 7 lines in the file
Sovrn — accounts 230102, 230102-eb, 408376 and 24 more: 27 lines in the file
OpenX — accounts 545708355, 558218698, 537149888 and 11 more: 14 lines in the file
Smaato — accounts 1100000579, 1100047145, 1100047290 and 1 more: 4 lines in the file
Yahoo — accounts 55248, 55774, 58578: 3 lines in the file
Yandex Ads — account 91473013: 27 lines in the file, 142 expected lines missing
Ogury — account 58c5c0a0-35a2-4926-83f8-64073963ae02: 5 lines in the file, 13 expected lines missing
Mintegral — partner (reseller) lines only: 112 lines in the file, 400 expected lines missing
Unity Ads — partner (reseller) lines only: 13 lines in the file, 147 expected lines missing
ironSource / LevelPlay — partner (reseller) lines only: 17 lines in the file, 108 expected lines missing
Liftoff Monetize (Vungle) — partner (reseller) lines only: 52 lines in the file, 338 expected lines missing
Chartboost — partner (reseller) lines only: 86 lines in the file, 400 expected lines missing
InMobi — partner (reseller) lines only: 24 lines in the file, 247 expected lines missing
DT Exchange (Fyber) — partner (reseller) lines only: 39 lines in the file, 400 expected lines missing
VK Ads (myTarget) — partner (reseller) lines only: 19 lines in the file, 125 expected lines missing
BIGO Ads — partner (reseller) lines only: 96 lines in the file, 400 expected lines missing
Yango Ads — partner (reseller) lines only: 214 lines in the file, 400 expected lines missing
DSP Exchange — partner (reseller) lines only: 110 lines in the file, 400 expected lines missing
Maticoo (zMaticoo) — partner (reseller) lines only: 42 lines in the file, 400 expected lines missing
Verve (PubNative) — partner (reseller) lines only: 70 lines in the file, 400 expected lines missing
HyprMX — partner (reseller) lines only: 37 lines in the file, 332 expected lines missing
Start.io — partner (reseller) lines only: 16 lines in the file, 141 expected lines missing
CAS.ai — partner (reseller) lines only: 25 lines in the file, 140 expected lines missing
DSail — partner (reseller) lines only: 25 lines in the file, 140 expected lines missing
Bidmachine — partner (reseller) lines only: 156 lines in the file, 400 expected lines missing

Invalid lines

bizzclick, 898, DIRECT, 7e936b1feafdaa61
contextweb.com, 560288, RESELLER, 89ff185a4c4e857c //duplicada
RESELLER, 6a698e2ec38604c6
nativo.com, RESELLER, 59521ca7cc5e9fee

Corrected file: los40.com app-ads.txt (fixed).

FAQ

Does los40.com have an app-ads.txt?

Yes — https://los40.com/app-ads.txt has 2,104 lines (checked 19 Oct 2026).

Which ad networks does los40.com work with?

Its app-ads.txt lists Xandr (Microsoft), Amazon Publisher Services, Criteo, Google AdMob, Index Exchange, PubMatic, Magnite (Rubicon), TripleLift, Sovrn, OpenX, Smaato, Yahoo and 20 more.

los40.com app-ads.txt check

Ad networks in los40.com/app-ads.txt

Invalid lines

FAQ

Does los40.com have an app-ads.txt?

Which ad networks does los40.com work with?

Is the app-ads.txt of los40.com correct?

Other checked domains

More