CPV code 50330000 designates Maintenance services of telecommunications equipment in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
50330000 sits under 50300000 (Repair, maintenance and associated services related to personal computers, office equipment, telecommunications and audio-visual equipment) and groups 4 more specific sub-codes. When classifying a tender, choose the narrowest code that still covers the full subject of the contract.