The names can contain letters, numbers and scripts (-). Spaces nor another type of symbols are not allowed.
A domain name cannot begin nor finalize with scripts.
The domain names are written in small letters, and must finalize in .com, .net, .org, .mx, .tv, .us, .info, .biz, etc.
The domain names cannot altogether be majors to 63 characters.
The domains must be in favor formed only of letters and numbers (from a to z and from the 0 to the 9). Also the script is valid (-), but could not be located as last nor as first character of the domain. The domains cannot contain spaces, points (. : nor special characters as &, %, $,/, (,), =? , , ! .