SIC code 6420 classifies telecommunications businesses. There are 3 active companies registered under this code in the UK. It falls under Section I (Transport, storage and communication) of the UK SIC 2007 classification system. With an average company age of 29.0 years, this is a well-established sector with mature businesses.
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.
There are currently 3 active companies registered under SIC code 6420 in the UK, out of 107 total registrations (including dissolved companies).
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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: 2026-04-05.