51221000 - Installation services of automatic airport check-in devices

CPV code 51221000 in the EU Common Procurement Vocabulary refers to Installation services of automatic airport check-in devices. It sits at level 4 of the CPV hierarchy as a category within the 51 division. This code is nested directly under 51220000, narrowing the broader category into the specific area of installation services of automatic airport check-in devices. As a leaf code, 51221000 has no further subdivisions and represents the most precise classification available in this branch — buyers should reference it directly in tender notices when the procurement primarily concerns installation services of automatic airport check-in devices. Contracting authorities across the EU use 51221000 in TED notices and national procurement portals to signal that a tender relates to installation services of automatic airport check-in devices.