IDN : Internationalized domain name

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What is IDN ?

An Internationalized Domain Name is a domain name that may contain characters that are not defined by the ASCII standard. These characters are, the common accented letters in many European languages​​, as well as other characters which do not belong to the Latin alphabet, including Arabic or Cyrillic.

Technically accented characters can not be used in DNS, which is why every IDN is encoded as a string of non-accented character whose shape is called ACE. In the latter, the domain names begin with XN - to differentiate unaccented domain names.

How IDN are supported ?

For IDN to work you must use compatible software. The most recent versions support IDNs but here is a list of compatible versions:


  • Firefox 0.6 and >
  • Internet Explorer 5.0 and >

+ i-NavTM plug-in

  • Internet Explorer 7 and >
  • Mozilla 1.4 and >
  • Netscape Navigator 7.1 and >
  • Opera 7.11 and >
  • Microsoft Outlook and Outlook Express + i-NavTM plug-in
  • Chrome 1.0 and >

Mac OS X

  • Camino Version: 0.7 and >
  • Firefox 0.6 and >
  • Mozilla 1.4 and >
  • Netscape Navigator 7.1 and >
  • Opera 7.11 and >
  • Safari 1.2 and >
  • Chrome 1.0 and >


  • Epiphany 1.2.2 and > (Gnome)
  • Firefox 0.6 and >
  • Galeon 1.3.14 and > (Gnome)
  • Konqueror 3.2 and > (KDE)
  • Mozilla 1.4 and >
  • Netscape Navigator 7.1 and >
  • Opera 7.11 and >
  • Mutt 1.4.1 and >
  • Chrome 1.0 and >

Registration of accented domain names in FranceDNS?

FranceDNS allows you to register domain names with all allowed characters in the following extensions:

Switzerland .CH - 32 accented characters

Zone Europe .EU - List of supported characters

France .FR - 30 accented characters: ß à á â ã ä å æ ç è é ê ë ì í î ï ñ ò ó ô õ ö ù ú û ü ý ÿ œ

Belgium .BE - 33 accented characters: ß à á â ã ó ô þ ü ú ð ä å ï ç è õ ö ÿ ý ò æ é ê ë ì í ø ù î û ñ œ

Luxembourg .LU - 17 accented characters: ä ö ü à â æ ç è é ê ë î ï ô ù û œ

Generic .COM, .BIZ, .INFO, .NET, .ORG - All accented characters

When ordering, you can specify the domain name in its accentuated form or in its ACE form. Our IDN conversion tool available on this page allows to determine the encoding of the domain name in his or IDN or ACE form.

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