- CEO
- Ralph Dommermuth
- Full Time Employees
- 4,678
- Sector
- Communications
- Industry
- Specialty telecommunications
- Address
- Elgendorfer Straße 57 Montabaur RP Germany 56410
- IPO Date
- Apr 22, 1998
- Business
- 1&1 AG functions as a prominent telecommunications service provider within Germany. The company’s operations are divided across its Access and 1&1 Mobile Network divisions. It delivers a comprehensive array of broadband and mobile communication solutions, alongside associated applications like home networking, secure online storage, telephony services, smart home capabilities, and interactive television. The firm is also engaged in the sale of telecommunication devices and accessories. A significant aspect of its strategy involves developing and operating Europe's inaugural fully virtualized 5G mobile network, built on Open RAN technology. This network officially launched its 5G mobile services in December 2023. Currently, 1&1 customers access national roaming through Telefónica Germany, with a transition planned to Vodafone's network for 5G roaming. The company is in the process of migrating its extensive customer base to its proprietary 5G infrastructure, having reached 10 million users on its Open RAN 5G network by June 2025. In November 2025, 1&1 AG announced an agreement to acquire 1&1 Versatel GmbH from its parent company, United Internet AG, securing direct access to Versatel's nationwide fiber-optic network. The company markets its offerings through various brands, including 1&1, yourfone, smartmobil.de, winSIM, PremiumSIM, simply, DeutschlandSIM, and sim.de, catering to both value and price-sensitive consumer segments. As of mid-2025, 1&1 served approximately 16.33 million customer contracts, comprising 12.44 million mobile and 3.89 million broadband connections. Founded in 1988, 1&1 AG maintains its headquarters in Montabaur, Germany, and operates as a subsidiary of United Internet AG.