• the domain name must not already be assigned   
  • the length of the name must be a minimum of 3 and a maximum of 63 characters for second level domains
  • it may include alphanumeric characters (letters from A to Z and numbers from 0 to 9)
  • the hyphen (-) must not be placed at the beginning nor at the end of the name
  • it cannot include special characters
  • it cannot be a forbidden domain  
  • it cannot be a reserved domain.