Does .localhost exist?

Not really. No — .localhost is permanently reserved and always points to your own machine.

The full story

RFC 6761 reserves .localhost; it must always resolve to the loopback address (127.0.0.1 / ::1). It will never be available for registration — it IS your computer.

Wondering about another extension? Every real TLD is in the directory.

This answer is generated from the live IANA root zone list, not from vibes. If the DNS changes, this page changes.