What are the valid characters and valid lengths for .mn domain names?
MN names can contain the English-language letters A through Z, and the digits 0 through 9. You can also use hyphens, but your domain name cannot begin or end with a hyphen. Spaces and special characters (such as !, $,_, &, and so on) are not permitted. The minimum length is 3 characters, and the maximum length is 63 characters (excluding “http://www” and “.mn”).