SIC code 6420 — Telecommunications — is a specialist classification with 3 active companies in the UK. Despite its small size, this category represents an important part of the transport, storage and communication sector. It falls under Section I (Transport, storage and communication) of the UK SIC 2007 classification system, which is used by Companies House to categorise all registered businesses.
See the full industry analysis on the Telecommunications industry page.
The telecommunications sector shows high turnover: only 3% of the 107 companies ever registered under this code remain active. A 97% dissolution rate is significantly above the UK average, suggesting challenging market conditions or frequent business restructuring in this sector. With an average age of 29.0 years, companies in this sector tend to be well-established. This maturity reflects high barriers to entry and strong business continuity among surviving firms. Company formation is spread across decades: 0% pre-1990, 100% in the 1990s, 0% in the 2000s, 0% in the 2010s, and 0% since 2020.
SIC code 6420 stands for "Telecommunications" under the UK Standard Industrial Classification (SIC 2007) system. It belongs to Section I — Transport, storage and communication. Companies use this code when registering with Companies House to indicate their primary business activity. The code is required for annual confirmation statements and is used by HMRC, ONS, and other government bodies for statistical and regulatory purposes.
There are currently 3 active companies registered under SIC code 6420 in the UK, out of 107 total registrations. This gives a survival rate of 3%, meaning 97% of companies registered under this code have since dissolved. These figures are based on Companies House data and updated regularly.
Formation rates for SIC 6420 have been moderate: 0% of active companies formed since 2020, compared to 0% in the 2010s. The sector appears stable, with a balanced mix of established and newer businesses.
Companies classified under SIC 6420 have an average age of 29.0 years. This indicates a mature sector where businesses tend to operate long-term.
Related SIC codes within the same division include: 64209 (Activities of other holding companies n.e.c.), 64999 (Financial intermediation not elsewhere classified), 64205 (Activities of financial services holding companies), 64304 (Activities of open-ended investment companies). Companies may use multiple SIC codes if they operate across several of these related activities. When registering with Companies House, businesses should select the code that best represents their primary activity.
You can search for companies with SIC code 6420 (Telecommunications) using UVAGATRON's company explorer, which allows filtering by SIC code, location, and company status. Alternatively, Companies House offers a basic search on their website. Our platform adds risk intelligence, director networks, and signals from 50+ government databases to each company record.
Search, filter, and analyse 3 companies classified under this SIC code with AI-powered risk intelligence.
Data sourced from Companies House, HM Land Registry, FCA Register, and 50+ government databases. SIC classification follows the UK Standard Industrial Classification of Economic Activities 2007 (SIC 2007). Last updated: 2026-04-17.