O2 Telefónica is a leading full-service provider of telecommunications services for consumers and business customers. The portfolio of the core brand O2 and various secondary and partner brands includes not only traditional telephony and Internet connections but also innovative digital services in the area of the Internet of Things and data analysis. The company's high-performance, award-winning mobile network reaches over 99% of the population. In the fixed network, O2 Telefónica offers its customers the greatest technological diversity and geographical availability of any provider in Germany. Telefónica Deutschland Holding AG is listed on the TecDAX and MDax and has been part of the Eurostoxx 600 since June 2022. The company is majority-owned by the Spanish telecommunications group Telefónica S.A., headquartered in Madrid, one of the largest telecommunications groups in the world.
Telefónica Tech is the central technology partner for digital solutions of the Telefónica Group.