Every website lives on a server somewhere, and that server's address belongs to a company. We look up the site's address and who owns it, check the name the server goes by, and read the small notes many hosts leave in every page they send out, like Kinsta, WP Engine, or Shopify's own tags.

Why it sometimes says "hidden". Lots of sites sit behind a service like Cloudflare that speeds them up and protects them. Visitors only ever talk to Cloudflare, so the real hosting company is out of sight on purpose. When that happens we say so, rather than guess, and show any clues we did find.

Big cloud companies. If the answer is Amazon, Google, or Microsoft, the site might be run on that cloud directly, or by a hosting company that rents space there. Either way, that's where the server physically lives.

DNS and email are separate. The company that runs a domain's DNS or email is often different from the one hosting the website, so we list all three.

Free use is limited to 50 lookups per day.