Domain names with national characters (IDN domains)


IDN stands for Internationalised Domain Names and comprise domain names with characters that are not included in the domain name system’s list of characters, which only encompasses the characters a-z, 0-9 and hyphens.

The ability to register .se domains with the characters å, ä and ö, as well as é and ü has been available since 2003. In 2007, the characters found in the official Swedish minority languages were also added: Finnish, the Meänkieli dialects (the Finnish of the Tornedal region), Sami, Romani and Yiddish. At the same time, the characters for the other Nordic languages also became applicable in .se domains.

The collective term for domain names with any of these characters is IDN domains (Internationalised Domain Names). Click here for a complete table of all characters allowed.

Read more about how to register a new domain with us here

IDNs work on most web browsers

IDNs can be used on most web browsers, although there is no solution for managing these characters in e-mail addresses. If you want to use a domain as an e-mail address, the domain name cannot comprise any characters beyond those encompassed by the domain-name system’s character list, meaning a-z, 0-9 and hyphens.

Converted in DNS

The domain name system (DNS) only allows the characters a-z, 0-9 and hyphens. Managing the other characters in DNS requires the use of a method for recoding to represent the characters that are found in internationalized domain names registered with IIS. You can use our conversion tool in the DomainManager to convert IDN domain names to a domain name that is adapted to DNS and vice versa.