What is .invalid?
The .invalid top-level domain is reserved for cases where a domain is purposely not meant to resolve. It's often used in technical documentation, testing, or error handling to signal a non-functional or deliberately bogus address.
For further information, see Special-Use Domain Names (RFC 6761) and Reserved Top Level DNS Names (RFC 2606).
You can't register a name under .invalid at any registrar, and it's not meant to resolve on the public internet. That's exactly why it's useful: software and people can rely on it never colliding with a real website.
.invalid FAQ
Can I buy a .invalid domain?
No. .invalid is reserved by IANA for a special purpose and is not open for registration.
What is .invalid used for?
Used for clearly invalid domain names.
Sources
Data from IANA root zone version 2026102000. Spotted something wrong? Tell us.