30 websites carry this reCAPTCHA site key in its source code@if (Model.Total > IdentifierModel.MaxSites) { ; the 200 highest-ranked are listed }. The site key the reCAPTCHA loader or widget carries.
Which websites use the reCAPTCHA site key _reCAPTCHA_site_key_?
The 30 sites listed on this page: each has the id in its stored HTML or first-party JavaScript. The site key the reCAPTCHA loader or widget carries; sites sharing one are usually run by the same owner, agency or platform.
How was _reCAPTCHA_site_key_ 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.