WhichAdNetwork is a free index of the world’s websites and the advertising networks that monetise them. Look up a domain to see every network monetising it — or open a network to see all the sites it works with.
Showing only sites confirmed by both parties — the toggle under “What the verification marks mean” shows all 39,459.
Every listing starts as a network naming the site in its own published seller list. We then read the site’s ads.txt — the file where a publisher names the ad companies it authorises — to see whether the site names the network back.
Ranked by the number of live sites we currently detect them on. All 21 networks →
WhichAdNetwork is a free ad network lookup tool: a searchable database of 39,459 websites and the 21 display advertising networks — Mediavine, Raptive, Ezoic, Monumetric and more — that monetise them. Every match comes from the sellers.json files networks publish and the ads.txt files sites publish, so a listing means the network named the site — not that we guessed from page markup.
A site is only marked confirmed when the network lists it and the site lists the network back. One-sided claims are labelled as exactly that.
See which ad networks accept websites like yours, and at what authority level, before you apply. Requirements stop being guesswork when you can read the roster.
Open any network and filter its inventory by niche and authority. What a network can actually reach is listed, not pitched.
Niche pages map a competitive set in one screen. First-seen and last-seen dates on every record separate a long partnership from a brief test.
Type the domain into the search box above. The site's page lists every advertising network we can tie to it, with the evidence behind each match and the dates we first and last saw it.
From the sellers.json files ad networks publish and the ads.txt files websites publish — the ad industry's own authorisation records — cross-checked against each other and refreshed nightly.
The network lists the site in its sellers.json and the site lists that network back in its ads.txt, or the network's ad code is live on the site. Both sides agree, so the relationship is confirmed rather than merely claimed.
21 display advertising networks, including premium managed networks like Mediavine, Raptive, Ezoic and Monumetric alongside programmatic exchanges. Each network page lists every site we detect it on.
Yes. Browsing is free, and a free account unlocks the full table of 39,459 sites with search, filtering and sorting.
Use the Report page to flag an error, or the Submit page to add a site we have missed. Corrections flow through the same nightly rebuild as everything else.