It is possible to register the letters a to z, the numbers 0 to 9 and the hyphen “-“. However, it is not possible to register domains that begin or end with a hyphen “-“ or have it in the 3rd and 4th position, and they should not start with the characters “xn—“.
In addition, the following characters are allowed: á, é, í, ó, ú, ü y ñ