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.

opera.com app-ads.txt check

opera.com is missing out on higher CPMs: its app-ads.txt has 2 invalid lines and lists only 6,167 of the 10,519 lines its 28 ad networks expect (41% missing). Unlisted sellers can't be verified, so buyers bid less or skip the inventory.

Checked 19 Oct 2026. 3,090 lines, 3,087 unique records, 0 duplicates, 2 invalid lines, 39 ad networks detected.

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

AppLovin — account 2ee3b7a1b2ddc58f0177610caf024a9d: 26 lines in the file, 10 expected lines missing
Xandr (Microsoft) — account 9284: 1 line in the file
Amazon Publisher Services — account 9497c599-e539-47f6-853b-74adef65b879: 1 line in the file
Bidmachine — account 1469: 400 lines in the file, 400 expected lines missing
BIGO Ads — account 822: 395 lines in the file, 400 expected lines missing
BlueSea — account 204037: 23 lines in the file, 15 expected lines missing
CAS.ai — account babe9c54: 130 lines in the file, 35 expected lines missing
Criteo — account B-062019: 1 line in the file
Display.io — account 194746: 14 lines in the file, 19 expected lines missing
Meta Audience Network — account 10152966432629973: 1 line in the file
DT Exchange (Fyber) — account 235949: 399 lines in the file, 52 expected lines missing
Google AdMob — accounts pub-1688645265745308, pub-1883810847636355, pub-4721105574136909 and 3 more: 6 lines in the file
Index Exchange — account 215209: 1 line in the file
InMobi — account ddb41d8a9f434a918d05a0fc9999d9f9: 123 lines in the file, 149 expected lines missing
Sovrn — accounts 323999, 411915, 543917 and 4 more: 7 lines in the file
Mintegral — account 43467: 384 lines in the file, 400 expected lines missing
OpenX — accounts 544015448, 557066889, 559912325 and 4 more: 7 lines in the file
TikTok Ad Network (Pangle) — account 56621: 1 line in the file
PubMatic — accounts 161652, 163421, 164418 and 4 more: 7 lines in the file
Verve (PubNative) — account 1007139: 400 lines in the file, 400 expected lines missing
Magnite (Rubicon) — accounts 23726, 25546: 2 lines in the file
Smaato — account 1100055933: 1 line in the file
Start.io — accounts 116712987, 117514417: 88 lines in the file, 71 expected lines missing
TripleLift — accounts 14146, 6998: 2 lines in the file
Liftoff Monetize (Vungle) — account 676405dff3fa5d00114fee22: 361 lines in the file, 30 expected lines missing
Yandex Ads — accounts 104213332, 313302657: 137 lines in the file, 33 expected lines missing
Yango Ads — account 313302657: 400 lines in the file, 400 expected lines missing
Maticoo (zMaticoo) — accounts 104752, 5135063: 221 lines in the file, 225 expected lines missing
Unity Ads — partner (reseller) lines only: 77 lines in the file, 83 expected lines missing
ironSource / LevelPlay — partner (reseller) lines only: 62 lines in the file, 63 expected lines missing
Chartboost — partner (reseller) lines only: 356 lines in the file, 400 expected lines missing
VK Ads (myTarget) — partner (reseller) lines only: 61 lines in the file, 83 expected lines missing
Bidease — partner (reseller) lines only: 32 lines in the file, 17 expected lines missing
DSP Exchange — partner (reseller) lines only: 170 lines in the file, 391 expected lines missing
Monetrix — partner (reseller) lines only: 51 lines in the file, 42 expected lines missing
Prado — partner (reseller) lines only: 12 lines in the file, 15 expected lines missing
HyprMX — partner (reseller) lines only: 156 lines in the file, 213 expected lines missing
Kidoz — partner (reseller) lines only: 8 lines in the file, 14 expected lines missing
DSail — partner (reseller) lines only: 130 lines in the file, 35 expected lines missing

Invalid lines

lemmatechnologies, 1844, RESELLER
strongmetrics, 244905, DIRECT

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

FAQ

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

Yes — https://opera.com/app-ads.txt has 3,090 lines (checked 19 Oct 2026).

Which ad networks does opera.com work with?

Its app-ads.txt lists AppLovin, Xandr (Microsoft), Amazon Publisher Services, Bidmachine, BIGO Ads, BlueSea, CAS.ai, Criteo, Display.io, Meta Audience Network, DT Exchange (Fyber), Google AdMob and 27 more.

opera.com app-ads.txt check

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

Invalid lines

FAQ

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

Which ad networks does opera.com work with?

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

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