Name
- Chief Commissioner, Aden, 1932-19372
- Colonial Office, 1854-19662
- Admiralty, 1708-19641
- Board of Trade, 1786-19701
- Cable and Wireless Ltd, 1929-19811
- Committee of Imperial Defence, Imperial Communications Committee, 1919-19391
- Department of Overseas Trade, 1918-19531
- Eastern Telegraph Company, 1872-19291
- Foreign Office, 1782-19681
- Government of India, Commerce Department, 1872-19471
- International Telecommunication Union, 1865-1
- Lambert Brothers Ltd, 1845-1
- Legal Adviser and Solicitor to the Secretary of State for India, 1874-19471
- Perim Coal Company Ltd, Late 19th century - Mid 20th century1
- Political Resident, Aden, 1854-19321
- Secretary of State for the Colonies, United Kingdom, 1854-19661