.br WHOIS Lookup
.br is the country-code extension of Brazil, administered by registro.br. Look up a .br address and see what the record contains.
- 1.494 extensions
- IANA 1601 ICANN accredited
- 2 protocols — RDAP and WHOIS
Your IP address 216.73.216.31
.br WHOIS Lookup: The Fields of a registro.br Record
.br is Brazil's country code extension, delegated into the root zone on 18 April 1989 and operated by registro.br on behalf of the Brazilian Internet Steering Committee. Port 43 queries are answered by whois.registro.br, and an RDAP endpoint runs at rdap.registro.br. In our measurement on 12 August 2026 the reply carried nineteen fields, and the zone held a DS record in the root.
Identity is unusually open here. In the record we measured, the holder's name, their national company number and the name of the technically responsible person were each readable on their own line. No other registry among those we measured publishes a company number; it makes matching a domain to an entity in official records possible directly. On the RDAP side the registrant and the technical contact were listed with their names as well.
Two things are missing in return: the reply carries no expiry date and no field naming a registrar. There is also a technical detail — the server sends its reply in the Latin-1 character set rather than UTF-8. A client assuming UTF-8 therefore sees Portuguese letters mangled; that is the cause when odd characters appear in raw output. To compare neighbouring markets, see the .cl WHOIS lookup and .us WHOIS lookup pages.
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
- Delegated
- 18 April 1989
- Fields measured
- 19 fields (12 August 2026)
- Arrives open
- The holder's name, national company number and responsible person
- Withheld
- No expiry date and no field naming a registrar in the reply
WHOIS FAQ
Does a .br WHOIS record show the domain holder?
It does. In the record we measured the holder's name stood on an open line, with the national company number and the name of the technically responsible person readable beside it. On the RDAP endpoint the registrant and the technical contact were listed with their names too. This is one of the few extensions where identity data is open on both channels; on records held by natural persons the same openness may not apply.
What is the registry number in a .br record?
It is the holder's unique identifier in the national commercial register, and it arrived open in the record we measured. Among the fifty-three extensions we measured, no other registry publishes such a number. Its practical value is verification: similar names can belong to different entities, while the number is unique. When you need to match a domain to an organisation in official records, that line answers directly.
Does a .br record carry an expiry date?
No. In our measurement the reply held creation and last-change dates but no expiry, and the RDAP event list likewise contained only registration and last change. There is no separate field naming a registrar either. If you need to track the term of a .br address, the record kept by the organisation that registered it is the only reliable source.
Why do characters look broken in .br WHOIS output?
Because the server sends its reply in the Latin-1 character set rather than UTF-8. A client assuming UTF-8 shows Portuguese letters mangled; decoded with the correct character set the same reply reads cleanly. If you are writing your own tool, the character set has to be stated explicitly for .br. This concerns how the record travels, not what it contains.
What does the RDAP endpoint give for .br?
The rdap.registro.br endpoint returns the same record as JSON and lists the registrant and the technical contact as separate entities complete with names. Registration and last change appear among the events; there is no expiry event here either. The benefit of the JSON form shows in automated systems: field positions are fixed and no character-set problem arises.
How does an available .br name appear in a lookup?
Query a name nobody holds and the server reports that no match was found, with no holder, company number or name server lines. That means the name looks free to register. We keep such a result for five minutes only and registered ones for six hours, the short window being there because a name that looks free can be taken quickly.