Free email check
Is this a throwaway address?
Free and disposable addresses say little about who a sender is. Paste addresses or domains to classify them, then optionally see who hosts each domain's mail.
Looks things up straight from your browser. When you press the button, this page asks Google Public DNS (only if you press the optional mail-server check) directly, with no cookies and no referrer. We never see the lookup. Private addresses and internal names are never sent. Nothing is saved, and reloading clears everything.
The first check uses a list built into the page. The optional second step asks Google Public DNS for each domain's mail servers.