UK SIC 2007 code in Section O: Public administration and defence; compulsory social security
84220 Defence activities
SIC 84220 is the UK code for defence activities. Companies House accepts it when you register a company or file a confirmation statement.
- Code
- 84220 (UK SIC 2007, Companies House list)
- Section
- Section O: Public administration and defence; compulsory social security
- Division
- 84 Public administration and defence; compulsory social security
- SIC 2026
- 84.22 Defence activities (1:1)
- Closest US NAICS
- 922190, 928110
Activities ONS lists under 84220
The ONS index assigns these 31 activities to this code. If one describes your company, this is the code to use.
- Administration of defence-related research and development policies and related funds
- Administration supervision and operation of engineering, and other non-combat forces and commands
- Administration supervision and operation of intelligence and other non-combat forces and commands
- Administration supervision and operation of land, sea, air and space defence forces
- Administration supervision and operation of military defence affairs
- Administration supervision and operation of reserve/auxiliary forces of the defence establishment
- Administrative, operational and supervisory services related to civil defence
- Administrative, operational and supervisory services related to military defence
- Army establishment (civilian personnel)
- Army establishment (service personnel)
- Civil defence administration
- Defence activities
- Health activities for military personnel in the field
- Maritime search and rescue (military)
- Military defence administration
- Military logistics
- Military ports
- Ministry of Defence (civilian personnel)
- Ministry of Defence (forces personnel)
- Ministry of Defence Headquarters
- Pay and personnel agency (armed forces)
- Princess Mary’s RAFNS
- Queen Alexandra’s RANC
- Queen Alexandra’s RNNS
- Royal Air Force Establishments (civilian personnel)
- Royal Air Force Establishments (service personnel)
- Royal Marines
- Royal Navy establishments (civilian personnel)
- Royal Navy establishments (service personnel)
- Support for defence plans and exercises for civilians
- Territorial Army
Source: ONS UK SIC 2007 alphabetical index.
What changes in SIC 2026
ONS published UK SIC 2026 in 2026. Its correspondence table maps this code's class (84.22) to:
| SIC 2026 code | Heading | Link type |
|---|---|---|
| 84.22 | Defence activities | 1:1 |
"1:1" means the class carries over unchanged in scope; other link types mean it was split or merged. Companies House still uses SIC 2007, so keep filing with 84220 until it announces a switch.
Closest US NAICS codes
Matched through the shared international class (ISIC Rev. 4). Treat these as a starting point and read the definition before using one.
Similar codes to compare
Data last changed November 14, 2026. Source: Companies House condensed SIC list. How this page is built.