Area Codes Luxembourg The Area Codes of Luxembourg: City/Town or Region Area code 1. Mertzig/Wahl 2688 (+352 2688) 2. Mertzig/Wahl 2788 (+352 2788) 3. Mertzig/Wahl 88 (+352 88) 4. Mertzig/Wahl 2488 (+352 2488) 5. Mondorf-les-Bains/Bascharage/Noerdange/Remich 2723 (+352 2723) 6. Mondorf-les-Bains/Bascharage/Noerdange/Remich 23 (+352 23) 7. Mondorf-les-Bains/Bascharage/Noerdange/Remich 2423 (+352 2423) 8. Mondorf-les-Bains/Bascharage/Noerdange/Remich 2623 (+352 2623)