42.22.Z - Works related to construction of telecommunications and electricity lines
46.52.Z - Wholesale of electronic and telecommunications equipment and parts thereof
95.12.Z - Repair and maintenance of (tele)communication equipment
77.32.Z - Rental and leasing of construction machinery and equipment
74.90.Z - Other professional, scientific and technical activities not elsewhere classified
68.20.Z - Rental and operating of own or leased real estate
66.22.Z - Activities of insurance agents and brokers
66.19.Z - Other activities auxiliary to financial services, except insurance and pension funding
64.99.Z - Other financial service activities, except insurance and pension funding not elsewhere classified
61.90.Z - Other telecommunications activities
61.20.Z - Wireless telecommunications activities, excluding satellite telecommunications activities
61.10.Z - Wired telecommunications activities
47.42.Z - Retail sale of telecommunications equipment in specialised stores
35.11.Z - Production of electricity
43.99.Z - Other specialised construction activities not elsewhere classified
43.29.Z - Other construction installation
43.22.Z - Plumbing, heat and air-conditioning installation
43.21.Z - Electrical installation
43.13.Z - Test drilling and boring
43.11.Z - Demolition
42.21.Z - Works related to construction of transmission pipelines and distribution networks
42.11.Z - Works related to construction of roads and motorways
41.20.Z - Building works related to erection of residential and non-residential buildings
41.10.Z - Realization of building projects related to erection of buildings
