Reception desks of the Joint Social Security Centre Double click to activate the map Joint Social Security Centre (CCSS) Reception desks of the Joint Social Security Centre 4, rue Mercier L-2144 Luxembourg Luxembourg Phone : (+352) 40 141-1 Monday to Friday from 8.00 to 16.00 (+352) 40 141-1 ccss@secu.lu Reception desks of the Joint Social Security Centre Path to Reception desks of the Joint Social Security Centre Show on map