O2

organization

British telecommunications company

History Claim
Telefonica UK Limited, trading as O2 UK (stylised as O2), is a British telecommunications services provider. It is the second largest mobile network in the United Kingdom behind VodafoneThree, with approximately 22.4 million subscribers as of December 2025. The name derives from the oxygen molecule.
O2
Image: Wikimedia Commons

Handles

Social

Web

2 external identifiers

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