ISO 3166-2:LU is the entry for Luxembourg in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), which defines codes for the names of the principal subdivisions (e.g., provinces or states) of all countries coded in ISO 3166-1.
Currently for Luxembourg, ISO 3166-2 codes are defined for 3 districts.
Each code consists of two parts, separated by a hyphen. The first part is LU, the ISO 3166-1 alpha-2 code of Luxembourg. The second part is a letter.
Current codes 
Subdivision names are listed as in the ISO 3166-2 standard published by the ISO 3166 Maintenance Agency (ISO 3166/MA).
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|LU-L||Luxembourg (fr), Luxemburg (de)|
See also 
- Districts of Luxembourg, Statoids.com