Nameserver rules for .br domains
Each .br domain name must have two - six authoritative nameservers. Before you register or modify the domain name, you must list only those nameservers in its zone file.
If you want to register a .br domain name with us and use our nameservers, we handle this process for you.
If you want to use your own nameservers, you must set them up before you register or modify the domain name. You must also ensure that they are resolving properly before you assign them to the domain name in our system.
Note: You can use the DNS validation tool on Registro.br's website to ensure that your nameservers are resolving properly.
For example, if you want to register coolexample.br and use the nameservers ns1.coolexample.br and ns2.coolexample.br, then you must list those nameservers in the domain name's zone file.
After you set up your nameservers and register your domain name, use the instructions in Change nameservers for my domains to set the nameservers in our system.
For more detailed information on .at domains, see About .br Domains.