Free tool

Abuse-contact lookup

Paste a website address to see who runs it and where to send a takedown notice. The results come from public registration records (RDAP and WHOIS).

How to read this Registrant and admin emails are often a privacy proxy (an address like one ending in withheldforprivacy.com). That is still worth using, because the proxy forwards your message to the real owner. The addresses most likely to get content removed, though, are the hosting provider and the registrar. For how to use them, see how to send a DMCA notice.