Company lists · Data refreshed September 2026
Top 25 Telecommunication companies based in Germany
RevenueBase identified 480 telecommunication companies headquartered in Germany as of September 2026 and tracks 9,839 professional contacts across them, including 3,747 with verified work emails and 114 with mobile numbers. Berlin is the largest hub.
This list covers telecommunication companies headquartered in Germany, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 6, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest telecommunication companies based in Germany
Ranked by team size| # | Company | RevenueBase Smart Search | Contacts | ||
|---|---|---|---|---|---|
| 1 | Indirect evidence | 863 contacts → | |||
“1 & 1 Versatel - Der deutsche Glasfaserspezialist 1 & 1 Versatel ist als Telekommunikationsspezialist für Firmenkunden einer der führenden Anbieter von Daten, Internet- und…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 2 | Indirect evidence | 668 contacts → | |||
“Vantage Towers is one of Europe’s leading tower companies.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 3 | Indirect evidence | 443 contacts → | |||
“Als führender Glasfaseranbieter Bayerns verbindet M-net seit 1996 Menschen und Unternehmen in Bayern, im Großraum Ulm und im hessischen Main-Kinzig-Kreis mit zuverlässiger…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 4 | Indirect evidence | 248 contacts → | |||
“Die Plusnet GmbH, eine Tochtergesellschaft der EnBW, ist ein deutsches Telekommunikationsunternehmen mit Fokus auf Geschäftskunden.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 5 | Indirect evidence | 246 contacts → | |||
“Welcome to Medialine AG – your IT & C system house.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 6 | Indirect evidence | 201 contacts → | |||
“Founded in 2004, we at sipgate were the first German VoIP provider and have been developing internet and telephony services ever since.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 7 | Indirect evidence | 161 contacts → | |||
“Schnelles Internet für die Region #vernetzt - mit Highspeed in Verbindung bleiben Die NetCom BW GmbH mit Sitz in Ellwangen wurde 2014 gegründet und ist eine Konzerngesellschaft…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 8 | Indirect evidence | 145 contacts → | |||
“Menschen mit Lichtgeschwindigkeit begeistern – das ist die Vision, die die rund 250 Mitarbeiter:innen der DNS:NET Familie antreibt.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 9 | Indirect evidence | 134 contacts → | |||
“WER WIR SIND Die Circet Deutschland SE ist ein Unternehmen der Circet Group, dem führenden weltweiten Dienstleister für den Aufbau und die Wartung von…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 10 | Indirect evidence | 115 contacts → | |||
“Bei der MUGLER SE dreht sich alles um Telekommunikation.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 11 | Indirect evidence | 92 contacts → | |||
“Seit 2003 sind wir erfolgreich als Fullservice Dienstleister in der Telekommunikationsbranche tätig.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 12 | Indirect evidence | 89 contacts → | |||
“TelemaxX betreibt vier Hochsicherheits-Rechenzentren in Karlsruhe und bietet maßgeschneiderte Lösungen in den Bereichen #Rechenzentrumsflächen,#Housing und Managed Services.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 13 | Indirect evidence | 88 contacts → | |||
“TNG wurde 1997 in Kiel gegründet und hat sich von einem regionalen Anbieter zu einem der führenden Telekommunikationsanbieter Deutschlands entwickelt.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 14 | Indirect evidence | 85 contacts → | |||
“Grupo Zener ist seit über 35 Jahren eine der führenden Anlagenbaufirmen in den Bereichen Mobilfunk, Glasfaserinstallation und erneuerbare Energien in spanischsprechenden Märkten…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 15 | Indirect evidence | 75 contacts → | |||
“Herzlich willkommen bei Goetel, Ihrem Göttinger Glasfaseranbieter für Telefon- und Internet!” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 16 | Indirect evidence | 71 contacts → | |||
“PASM - Power and Air Condition Solution Management GmbH gewährleistet die Verfügbarkeit kritischer Infrastrukturanlagen aus dem Sektor Informationstechnik und Telekommunikation…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 17 | Indirect evidence | 68 contacts → | |||
“Als Firmengruppe gemeinsam stark: Mit mehr als 2.700 Mitarbeitenden an über 40 Standorten sind wir deutschlandweit der führende Dienstleister für die Telekommunikations- und…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 18 | Indirect evidence | 67 contacts → | |||
“Die HFO Telecom GmbH verbindet modernste Technologien im Telekommunikationsbereich mit langjähriger Erfahrung.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 19 | Indirect evidence | 65 contacts → | |||
“Der VATM e.V.(Verband der Anbieter im Digital- und Telekommunikationsmarkt) ist ein Wirtschaftsverband, in dem sich mehr als 180 der im deutschen Markt operativ tätigen…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 20 | Indirect evidence | 62 contacts → | |||
“Als eines der führenden Unternehmen in den Bereichen Engineering und Operations sorgen wir bundesweit sowie auch international für funktionierende Infrastrukturen im Festnetz- und…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 21 | Indirect evidence | 62 contacts → | |||
“LEONET ist seit über 16 Jahren auf dem Breitbandmarkt aktiv und setzt sich als Pionierunternehmen für digitale Chancengleichheit in ländlichen Regionen ein.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 22 | Strong evidence | 60 contacts → | |||
“Riedel Networks - tailormade media & telecommunication services Riedel Networks is a privately held, global network services provider, focused on tailormade networks.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 23 | Indirect evidence | 51 contacts → | |||
“Das TeleData Netz - das Netz der Zukunft?” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 24 | Indirect evidence | 49 contacts → | |||
“Die R-KOM Regensburger Telekommunikationsgesellschaft mbH wurde 1997 mit dem Ziel gegründet dem Markt ein alternatives, kostengünstiges und nachhaltiges Telekommunikationsangebot…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 25 | Indirect evidence | 47 contacts → | |||
“Folgen Sie für Nachrichten von LEW TelNet und der LEW-Gruppe.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: telecommunication companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names telecommunication companies.
- Partial evidence
- Its own public description names part of telecommunication companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name telecommunication companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 480 telecommunication companies based in Germany
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Telecommunication companies based in Germany at a glance
As of Sep 6, 2026Companies by employee count
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among telecommunication companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in Germany whose own description of what they do matches “telecommunication companies”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names telecommunication companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among telecommunication companies, and records with no verified work email. Companies headquartered outside Germany are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 3,747 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 6, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Telecommunication companies by metro
- Telecommunication companies in Berlin28
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names telecommunication companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many telecommunication companies are there based in Germany?
RevenueBase identified 480 telecommunication companies headquartered in Germany as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
1&1 Versatel, headquartered in Dusseldorf, tops this list with the largest team on record.
Which city has the most telecommunication companies?
Berlin leads with 28 headquartered companies, followed by Hamburg (21) and Munchen (15).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 3,747 verified decision-maker contacts tracked across these 480 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 6, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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