.br WHOIS Lookup
.br is Brazil's country code extension, run by registro.br. Look up a .br name to see who holds it, which name servers it uses and whether it is still free.
- 1,494 extensions
- IANA 1601 ICANN accredited
- 2 protocols — RDAP and WHOIS
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.br WHOIS Lookup: The Fields of a registro.br Record
.br is the country code extension of Brazil and has been in the root zone since 18 April 1989. The registry is the Brazilian Internet Steering Committee (Comitê Gestor da Internet no Brasil), and registro.br handles day-to-day operation. Port 43 queries go to whois.registro.br, and the same data is available over RDAP at rdap.registro.br. registro.br signs the .br zone with DNSSEC and publishes its DS record in the root.
A registro.br reply is unusually open about identity. The owner line gives the holder's name or company name, ownerid gives their national company registry number (CNPJ), and responsible names the person answerable for the domain. Contact handles, name servers, a DS record, the creation and last-change dates and the status follow on their own lines. For other registries in the Americas, open the .cl WHOIS lookup or the .us WHOIS lookup.
About the .br extension
- Extension
- .br
- WHOIS server
- whois.registro.br
- RDAP endpoint
- https://rdap.registro.br
- Registry
- Comitê Gestor da Internet no Brasil, operated by registro.br
- In the root zone since
- 18 April 1989
- Open identity fields
- Holder name or company name, national company number (CNPJ), responsible person
- RDAP
- rdap.registro.br
- Last checked
- 12 August 2026
Looking for whether a name is still free, rather than who holds it? run a domain name search
WHOIS FAQ
How do I find out who owns a .br domain?
Run a WHOIS lookup and read the owner line, which registro.br publishes in plain text for .br domains. The ownerid number and the name of the responsible person sit right next to it, and the RDAP record lists the registrant by name as well. Domains registered by private individuals may show less detail than company domains do.
What is the ownerid number in a .br WHOIS record?
The ownerid line holds the holder's number in Brazil's national company register, known as the CNPJ. Similar trading names can belong to different companies, while each number is issued to exactly one legal entity. If you need to confirm which organisation stands behind a .br domain before a purchase, a dispute or a partnership, compare this number with official company records.
Why do accented letters look broken in .br WHOIS output?
The registro.br server sends its port 43 reply in the Latin-1 character set. A client that decodes it as UTF-8 turns Portuguese letters such as ú or ç into replacement symbols, although the record itself is intact. If you query whois.registro.br from your own script, set the encoding to Latin-1 or use the RDAP endpoint, which does not have this problem.
Is there an RDAP service for .br domain names?
Yes, registro.br runs an RDAP endpoint at rdap.registro.br. It returns the same registration as structured JSON and lists the registrant and the technical contact as separate entities, each with a name. Automated systems gain the most from it, since every field sits in a fixed place and nobody has to guess the character set.
What does whois.com.tr show for a .br domain?
The whois.com.tr result screen shows four fields for a .br domain: the domain name, the holder, the name servers and the status. The ownerid number, the responsible person, the contact handles and the dates stay in the registry's raw reply, which opens in a separate tab. That tab is where you read the complete registro.br record.
How can I tell if a .br domain name is available?
An unregistered .br name gets a reply in which registro.br reports that no match was found, with no owner, ownerid or name server lines. The result screen then marks the name as available. If the reply carries an owner line, the name is already registered to the person or company written on it.