CPV code 72413000 designates World wide web (www) site design services in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
72413000 is a leaf code — the most specific level of its branch — so it can be used directly as the main CPV code of a contract notice. If it does not quite fit, check the neighbouring codes under 72410000 (Provider services).