Luxembourg (.lu) Domain Specifications


In this article, we will explain the policies regarding the Luxembourg (.lu) ccTLD.

The reader is encouraged to understand all the concepts and terms outlined in the Basics before proceeding further with this article. In fact, this article is written on the premise that the reader is familiar with the terminology used.


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If necessary, refer to the article about Country-Code Domain Specifications.

Registration rules

As of February 2021, there were no registration rules for this TLD, which focuses on Luxembourg.

Format of .lu

  • Minimum length: 1 character.
  • Maximum length: 63 characters.
  • Digits: allowed if they are entirely numeric.
  • Hyphens: allowed (middle only).
  • International Domain Name (IDN): allowed.

Specification of the Name Fields in the Luxembourg (.lu) ccTLD


Additional information

For additional information, please refer to

Updated on 7 February 2024

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