Usually domain names consist of the letters “a” to “z”, the digits
“0” to “9”, as well as the hyphen. All other characters are being
considered as special characters.
The special characters which are admitted for .at domains are
shown in the table
Latin Supplement.
If the domain name includes special characters, the domain has to
be specified as
Punycode
within the e-mail application form.
Please pay attention to the notices in the e-mail application form's
fill-in instructions
at chapter
“Domain name(s)”.