Domain WHOIS

What this tool does

The WHOIS lookup shows a domain's public registration data: when it was created, when it expires, which registrar manages it, which name servers it uses and what its status is. We use RDAP, the official successor to WHOIS, which returns the information in a standardized format straight from the source: Registro.br for .br domains and the registry in charge of each extension for everything else.

How to read the result

• Created: date of the first registration. Older domains tend to inspire more trust.
• Expires: expiration date. If it passes without renewal, the domain stops working and may later be released to someone else.
• Registrar: the company where the domain was bought and where it is renewed. .br domains are managed by Registro.br itself.
• Name servers: where the domain's DNS zone lives. If they are wrong, the website and email stop working.
• Status: codes such as active, client transfer prohibited (transfer lock) or pending delete (about to be deleted).
• DNSSEC: shows whether the domain digitally signs its DNS answers.

Common situations

"Domain not registered". The registry has no such name. It usually means the domain is available, but the final word is always the registrar's checkout.

Domain about to expire. Renew it in your registrar's dashboard. Many sites go down because the renewal notice went to an inbox nobody reads.

Why isn't the owner's name shown? We only show technical data. The registrant's personal information is not displayed here, and many registries already hide it for privacy.

Frequently asked questions

What is RDAP and how is it different from WHOIS?

RDAP is the protocol replacing WHOIS. It returns the same registration data, but in a standardized format, with support for accented characters and secure HTTPS access.

How do I know if a domain is available?

If the lookup says the domain is not registered, it is probably available. Always confirm with a registrar before paying.

How do I find out who owns a domain?

The registrant's data, when public, is in the official lookup of each extension's registry. For privacy, this tool only shows technical data.

What happens when a domain expires?

It stops working and enters a redemption period. If it is not renewed, it is released and anyone can register it.

How often is the data updated?

Each domain is looked up at the source and the result is cached for up to 24 hours to respect registry rate limits.