1&1 is a major telecommunications and internet service provider in Germany, offering a wide range of products including mobile tariffs, DSL connections, fiber optic internet, and hosting services. As part of the United Internet group, 1&1 is known for its competitive pricing and is currently focused on building out its own advanced 5G mobile network, aiming to become Germany's fourth mobile network operator. They cater to both private and business customers, emphasizing value and comprehensive service packages.
The Montabaur campus serves as the central hub for strategic management, product development, network operations, marketing, and administration for 1&1's telecommunications services.
The campus, often referred to as 'New Work City' or '1&1 Campus Montabaur', is a modern office complex designed with a focus on fostering collaboration, innovation, and employee well-being. It features contemporary architecture and extensive green spaces.
The work culture at 1&1's headquarters emphasizes technological innovation, customer-centricity, and a dynamic, fast-paced environment. The modern campus facilities are designed to support agile working methods and employee engagement.
The Montabaur headquarters is significant as the nerve center for 1&1's ambitious project to build Germany's fourth mobile network. It symbolizes the company's growth and its commitment to becoming a key player in the German telecommunications landscape.
1&1's primary market focus is Germany, where it offers its comprehensive suite of telecommunications services and is building its own mobile network. While its direct branded operations are concentrated in Germany, its mobile services support customers internationally through roaming agreements. The parent company, United Internet AG, has a broader international footprint, particularly through its web hosting and cloud services arm, IONOS, which operates in multiple European countries and North America. 1&1 also collaborates with global technology partners for its network infrastructure and service components.
Elgendorfer Straße 57
Montabaur
Rhineland-Palatinate
Germany
Address: Brauerstraße 48, 76135 Karlsruhe, Germany
Leverages the strong tech talent pool and research institutions in the Karlsruhe technology region. Plays a crucial role in developing and maintaining the technical infrastructure and services.
Address: Sapporobogen 6-8, 80637 München, Germany
Serves as a strategic point for engaging with customers and partners in Southern Germany, a significant economic region.
Address: Ernst-Reuter-Platz 2, 10587 Berlin, Germany
Strategic presence in the capital city, facilitating networking, business development, and access to a diverse talent pool.
Highperformr Signals uncover buying intent and give you clear insights to target the right accounts at the right time — helping your sales, marketing, and GTM teams close more deals, faster.
As of April 2025, 1&1 Telecommunication SE' leadership includes:
1&1 Telecommunication SE has been backed by several prominent investors over the years, including:
In the last 12 months, there have been no major, widely publicized changes to the top Management Board (Vorstand) of 1&1 AG. The current executive team has been focused on strategic initiatives, primarily the rollout of 1&1's 5G mobile network. Stability at the leadership level has characterized this period.
Discover the tools 1&1 Telecommunication SE uses. Highperformr reveals the technologies powering your target accounts — helping your sales, marketing, and GTM teams prioritize smarter and close faster.
1&1, like many German corporations, tends to use common email patterns. The most prevalent formats usually involve combinations of an employee's first name and last name.
Common formats include: [firstname].[lastname]@1und1.de (e.g., max.mustermann@1und1.de) or [f].[lastname]@1und1.de (e.g., m.mustermann@1und1.de). Variations might exist for different departments or legacy systems.
Format
anna.beispiel@1und1.de
Example
75%
Success rate
Reuters • December 8, 2023
1&1 officially launched its mobile network, becoming Germany's fourth network operator. The company aims to offer innovative services and compete with established players like Deutsche Telekom, Vodafone, and O2 Telefonica....more
TeleGeography • August 2, 2023
1&1 entered into a long-term national roaming partnership with Vodafone Germany. This agreement ensures 1&1 customers have nationwide mobile coverage while 1&1 continues to build out its own 5G network infrastructure....more
United Internet AG Press Release (via dgap.de or similar) • May 15, 2024
United Internet, parent company of 1&1, released its Q1 2024 financial results, highlighting continued investments in 1&1's 5G network build-out and growth in customer numbers for its mobile and DSL segments....more
See where a company’s workforce is located, by country or region.
View past and recent funding rounds with amounts and investors.
Understand company revenue estimates and financial scale.
Track active roles and hiring trends to spot growth signals.
Discover what a company offers—products, platforms, and solutions.
Get the company’s official SIC and NAICS classifications.
Analyze visitor volume, engagement, and top traffic sources.
Explore LinkedIn, Twitter, and other active social profiles.
Identify top competitors based on similar business traits.
Explore companies in depth — from the tech they use to recent funding, hiring trends, and buyer signals — all in one powerful view.
Highperformr AI helps you surface the right accounts and enrich your CRM with verified company and contact insights, so your teams can prioritize and engage faster.
Thousands of companies, including 1&1 Telecommunication SE, are just a search away.