It is possible to register the letters a to z, the numbers 0 to 9 and the hyphen “-“. In addition, the following characters are allowed: Portuguese Characters: á, à, â, ã, ç, é, ê, í, ó, ô, õ, ú and Chinese characters.
It is not possible to register domains that begin or end with a hyphen “-“ or have it in the third and fourth characters simultaneously.