21 websites carry this Yandex site verification in its source code@if (Model.Total > IdentifierModel.MaxSites) { ; the 200 highest-ranked are listed }. The yandex-verification meta tag.
Which websites use the Yandex site verification YOUR_YANDEX_VERIFICATION_CODE?
The 21 sites listed on this page: each has the id in its stored HTML or first-party JavaScript. The yandex-verification meta tag; sites sharing one are usually run by the same owner, agency or platform.
How was YOUR_YANDEX_VERIFICATION_CODE found?
By reading the stored source. PageSourceSearch keeps the exact bytes of the pages and scripts it crawls and extracts the identifier from the tag's own snippet or meta tag, so every listed site can be opened at the line that carries it.