Company lists · Data refreshed September 2026

Top 25 Enterprise telecom companies based in Germany

Name: Enterprise telecom companies based in Germany
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 522 companies tracked

RevenueBase identified 522 enterprise telecom companies headquartered in Germany as of September 2026 and tracks 8,965 professional contacts across them, including 4,017 with verified work emails. Berlin is the largest hub.

This list covers enterprise telecom 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 21, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

522Companies

8,965Contacts tracked

4,017Verified emails

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The 25 largest enterprise telecom companies based in Germany

Ranked by team size

Top 25 of 522 enterprise telecom companies based in Germany, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to enterprise telecom companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	1&1 Versatel	Indirect evidence	Düsseldorf, GermanyHQ checked Sep 21, 2026	1,001-5,000	863 contacts →
	Indirect evidence “1 & 1 Versatel - Der deutsche Glasfaserspezialist 1 & 1 Versatel ist als Telekommunikationsspezialist für Firmenkunden einer der führenden Anbieter von Daten, Internet- und…” Source: RevenueBase Database · checked Sep 21, 2026
2	Damovo	Indirect evidence	Düsseldorf, GermanyHQ checked Sep 21, 2026	501-1,000	697 contacts →
	Indirect evidence “Damovo is an international ICT service provider supporting business customers across the world on their path to digitization.” Source: RevenueBase Database · checked Sep 21, 2026
3	Axians Germany	Indirect evidence	Frankfurt Am Main, GermanyHQ checked Sep 21, 2026	1,001-5,000	403 contacts →
	Indirect evidence “AXIANS is the corporate brand for network infrastrucutures and corporate communications of VINCI Energies, one of the leading European providers of energy and information…” Source: RevenueBase Database · checked Sep 21, 2026
4	Plusnet Gmbh	Indirect evidence	Köln, GermanyHQ checked Sep 21, 2026	201-500	248 contacts →
	Indirect evidence “Die Plusnet GmbH, eine Tochtergesellschaft der EnBW, ist ein deutsches Telekommunikationsunternehmen mit Fokus auf Geschäftskunden.” Source: RevenueBase Database · checked Sep 21, 2026
5	Medialine Group	Indirect evidence	Bad Sobernheim, GermanyHQ checked Sep 21, 2026	501-1,000	246 contacts →
	Indirect evidence “Welcome to Medialine AG – your IT & C system house.” Source: RevenueBase Database · checked Sep 21, 2026
6	Spie ICS Spie Information & Communication Services Gmbh	Indirect evidence	Hannover, GermanyHQ checked Sep 21, 2026	1,001-5,000	212 contacts →
	Indirect evidence “Als zuverlässiger Partner mit einer breiten Technik-Expertise in den Leistungsfeldern IT Solutions, Unified Communication & Collaboration Solutions und Security Technology…” Source: RevenueBase Database · checked Sep 21, 2026
7	Sipgate	Indirect evidence	Düsseldorf, GermanyHQ checked Sep 21, 2026	201-500	201 contacts →
	Indirect evidence “Founded in 2004, we at sipgate were the first German VoIP provider and have been developing internet and telephony services ever since.” Source: RevenueBase Database · checked Sep 21, 2026
8	Netcom BW Gmbh	Indirect evidence	Ellwangen (jagst), GermanyHQ checked Sep 21, 2026	201-500	161 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 21, 2026
9	Ostertag Detewe	Indirect evidence	Düsseldorf, GermanyHQ checked Sep 21, 2026	201-500	153 contacts →
	Indirect evidence “Transform your business DeTeWe Communications have many years of experience in delivering tailored, integrated solutions for their clients internationally 365 days a year, 24…” Source: RevenueBase Database · checked Sep 21, 2026
10	DNS NET Internet Service Gmbh	Indirect evidence	Berlin, GermanyHQ checked Sep 21, 2026	201-500	145 contacts →
	Indirect evidence “Menschen mit Lichtgeschwindigkeit begeistern – das ist die Vision, die die rund 250 Mitarbeiter:innen der DNS:NET Familie antreibt.” Source: RevenueBase Database · checked Sep 21, 2026
11	Itenos Gmbh	Partial evidence	Bonn, GermanyHQ checked Sep 21, 2026	201-500	143 contacts →
	Partial evidence “ITENOS, headquartered in Bonn, Germany, is an experienced specialist for secure IT and telecommunications solutions.” Source: RevenueBase Database · checked Sep 21, 2026
12	Telcat Multicom Gmbh	Indirect evidence	Salzgitter, GermanyHQ checked Sep 21, 2026	501-1,000	117 contacts →
	Indirect evidence “Unsere TELCAT Gruppe zählt nicht umsonst zu den größten ITK-Systemhäusern Deutschlands.” Source: RevenueBase Database · checked Sep 21, 2026
13	Mugler SE	Indirect evidence	Oberlungwitz, GermanyHQ checked Sep 21, 2026	501-1,000	115 contacts →
	Indirect evidence “Bei der MUGLER SE dreht sich alles um Telekommunikation.” Source: RevenueBase Database · checked Sep 21, 2026
14	Innovaphone	Indirect evidence	Sindelfingen, GermanyHQ checked Sep 21, 2026	51-200	96 contacts →
	Indirect evidence “innovaphone has been playing a decisive role in driving the development of IP telephony and digital transformation for more than 25 years now and is a leading European provider of…” Source: RevenueBase Database · checked Sep 21, 2026
15	Aconnic	Indirect evidence	Munich, GermanyHQ checked Sep 21, 2026	201-500	94 contacts →
	Indirect evidence “aconnic has emerged from the UET Group and its operating companies and brands including albis-elcon, SUCONI, Albis Engineering and Albis Technologies.” Source: RevenueBase Database · checked Sep 21, 2026
16	S-Kon Gruppe	Indirect evidence	Hamburg, GermanyHQ checked Sep 21, 2026	501-1,000	92 contacts →
	Indirect evidence “Seit 2003 sind wir erfolgreich als Fullservice Dienstleister in der Telekommunikationsbranche tätig.” Source: RevenueBase Database · checked Sep 21, 2026
17	Telemaxx Telekommunikation Gmbh	Indirect evidence	Karlsruhe, GermanyHQ checked Sep 21, 2026	51-200	89 contacts →
	Indirect evidence “TelemaxX betreibt vier Hochsicherheits-Rechenzentren in Karlsruhe und bietet maßgeschneiderte Lösungen in den Bereichen #Rechenzentrumsflächen,#Housing und Managed Services.” Source: RevenueBase Database · checked Sep 21, 2026
18	Pÿur Business	Indirect evidence	Leipzig, GermanyHQ checked Sep 21, 2026	51-200	69 contacts →
	Indirect evidence “Seit über 25 Jahren stehen wir für leistungsstarke IT-Lösungen für Geschäftskunden.” Source: RevenueBase Database · checked Sep 21, 2026
19	Vitronet Gruppe	Indirect evidence	Essen, GermanyHQ checked Sep 21, 2026	1,001-5,000	68 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 21, 2026
20	Gamma DE	Partial evidence	Oberkotzau, GermanyHQ checked Sep 21, 2026	51-200	67 contacts →
	Partial evidence “Die HFO Telecom GmbH verbindet modernste Technologien im Telekommunikationsbereich mit langjähriger Erfahrung.” Source: RevenueBase Database · checked Sep 21, 2026
21	Riedel Networks	Partial evidence	Butzbach, GermanyHQ checked Sep 21, 2026	51-200	60 contacts →
	Partial evidence “Riedel Networks - tailormade media & telecommunication services Riedel Networks is a privately held, global network services provider, focused on tailormade networks.” Source: RevenueBase Database · checked Sep 21, 2026
22	Teledata Gmbh	Indirect evidence	Friedrichshafen, GermanyHQ checked Sep 21, 2026	51-200	51 contacts →
	Indirect evidence “Das TeleData Netz - das Netz der Zukunft?” Source: RevenueBase Database · checked Sep 21, 2026
23	Pfalzkom Gmbh	Indirect evidence	Ludwigshafen, GermanyHQ checked Sep 21, 2026	51-200	50 contacts →
	Indirect evidence “Warum PFALZKOM?” Source: RevenueBase Database · checked Sep 21, 2026
24	LEW Telnet Gmbh	Indirect evidence	Neusäß, GermanyHQ checked Sep 21, 2026	51-200	47 contacts →
	Indirect evidence “Folgen Sie für Nachrichten von LEW TelNet und der LEW-Gruppe.” Source: RevenueBase Database · checked Sep 21, 2026
25	Byon Gmbh	Indirect evidence	Frankfurt Am Main, GermanyHQ checked Sep 21, 2026	51-200	45 contacts →
	Indirect evidence “IT Managed Services und Cloud Telefonie 2006 wurde die byon gmbh mit Sitz in Frankfurt/Main gegründet.” Source: RevenueBase Database · checked Sep 21, 2026

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: enterprise telecom 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 enterprise telecom companies.
Partial evidence: Its own public description names part of enterprise telecom companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name enterprise telecom 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 522 enterprise telecom companies based in Germany

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Enterprise telecom companies based in Germany at a glance

As of Sep 21, 2026

44.8%Verified-email coverage

17.2Average contacts per company

11-50Median size (employees)

7.1%Largest-city concentration · Berlin

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

232

11-50

162

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for Germany, so it is reported there. Company counts and contact totals on this page are exact for Germany, over 522 companies.

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 enterprise telecom 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 “enterprise telecom 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 enterprise telecom 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 enterprise telecom 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, 4,017 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 21, 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.

Enterprise telecom companies by metro

Enterprise telecom companies in Berlin37

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 enterprise telecom 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 enterprise telecom companies are there based in Germany?

RevenueBase identified 522 enterprise telecom 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 enterprise telecom companies?

Berlin leads with 37 headquartered companies, followed by Hamburg (18) and Munchen (16).

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 4,017 verified decision-maker contacts tracked across these 522 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 21, 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.