What are the technical requirements for .NU domain names?
You may register any domain name which contains as few as three and as many as 63 characters (not including .NU). For an additional fee, you may register any domain name which contains one or two characters, or three numbers, using .NU Domain's Premium Name Services.
* Names may not begin or end with a dash, and upper case and lower case are treated as lower case only. Besides the - (dash) character, only alphanumeric characters a-z, 0-9 are accepted and characters from the European language ISO-8859-1 character set. Domain names may not contain spaces or any other non-alphanumeric characters (such as punctuation) or any non-ASCII characters except ISO-8859-1 characters.
