Company lists · Data refreshed September 2026

Top 25 Telecommunications installation companies based in Germany

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

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 619 companies tracked

RevenueBase identified 619 telecommunications installation companies headquartered in Germany as of September 2026 and tracks 4,674 professional contacts across them, including 1,846 with verified work emails. Berlin is the largest hub.

This list covers telecommunications installation 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 19, 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 19, 2026 86% judged on-target in blind review

619Companies

4,674Contacts tracked

1,846Verified emails

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The 25 largest telecommunications installation companies based in Germany

Ranked by team size

Top 25 of 619 telecommunications installation companies based in Germany, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to telecommunications installation 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	M-Net Telekommunikations Gmbh	Indirect evidence	München, GermanyHQ checked Sep 19, 2026	501-1,000	443 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 19, 2026
2	Plusnet Gmbh	Indirect evidence	Köln, GermanyHQ checked Sep 19, 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 19, 2026
3	Insyte Deutschland Gmbh	Partial evidence	Ratingen, GermanyHQ checked Sep 19, 2026	201-500	177 contacts →
	Partial evidence “Bei Insyte Deutschland arbeiten wir daran, unseren Kunden qualitativ hochwertige Dienstleistungen im Bereich der Installation, des Betriebs und der Wartung von Netzwerken und…” Source: RevenueBase Database · checked Sep 19, 2026
4	Netcom BW Gmbh	Indirect evidence	Ellwangen (jagst), GermanyHQ checked Sep 19, 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 19, 2026
5	DNS NET Internet Service Gmbh	Indirect evidence	Berlin, GermanyHQ checked Sep 19, 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 19, 2026
6	Glasfaserplus Gmbh	Indirect evidence	Köln, GermanyHQ checked Sep 19, 2026	51-200	132 contacts →
	Indirect evidence “Wir bringen das Netz der Zukunft in Ihre Region!” Source: RevenueBase Database · checked Sep 19, 2026
7	Rosenberger-Osi Gmbh & Co. OHG	Indirect evidence	Augsburg, GermanyHQ checked Sep 19, 2026	501-1,000	125 contacts →
	Indirect evidence “Since 1991, Rosenberger Optical Solutions & Infrastructure (Rosenberger OSI) has been a recognized expert for fiber-based connectivity, cabling solutions and infrastructure…” Source: RevenueBase Database · checked Sep 19, 2026
8	Pfalzwerke Netz AG	Indirect evidence	Ludwigshafen, GermanyHQ checked Sep 19, 2026	501-1,000	107 contacts →
	Indirect evidence “Eine flächendeckende, preiswerte und zuverlässige Netzanbindung ist unser Auftrag.” Source: RevenueBase Database · checked Sep 19, 2026
9	Aconnic	Indirect evidence	Munich, GermanyHQ checked Sep 19, 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 19, 2026
10	Fiber Experts Deutschland Gmbh	Indirect evidence	Düsseldorf, GermanyHQ checked Sep 19, 2026	51-200	88 contacts →
	Indirect evidence “Fiber Experts Deutschland GmbH ist ein auf Glasfaserausbau spezialisiertes Bauunternehmen mit Standorten in Düsseldorf und Köln.” Source: RevenueBase Database · checked Sep 19, 2026
11	MIH Gmbh	Indirect evidence	Horstmar, GermanyHQ checked Sep 19, 2026	1,001-5,000	82 contacts →
	Indirect evidence “We plan, develop and build fiber optic networks.” Source: RevenueBase Database · checked Sep 19, 2026
12	Goetel Gmbh	Indirect evidence	Göttingen, GermanyHQ checked Sep 19, 2026	51-200	75 contacts →
	Indirect evidence “Herzlich willkommen bei Goetel, Ihrem Göttinger Glasfaseranbieter für Telefon- und Internet!” Source: RevenueBase Database · checked Sep 19, 2026
13	Vitronet Gruppe	Indirect evidence	Essen, GermanyHQ checked Sep 19, 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 19, 2026
14	Leonet	Indirect evidence	Deggendorf, GermanyHQ checked Sep 19, 2026	51-200	62 contacts →
	Indirect evidence “LEONET ist seit über 16 Jahren auf dem Breitbandmarkt aktiv und setzt sich als Pionierunternehmen für digitale Chancengleichheit in ländlichen Regionen ein.” Source: RevenueBase Database · checked Sep 19, 2026
15	Teledata Gmbh	Indirect evidence	Friedrichshafen, GermanyHQ checked Sep 19, 2026	51-200	51 contacts →
	Indirect evidence “Das TeleData Netz - das Netz der Zukunft?” Source: RevenueBase Database · checked Sep 19, 2026
16	R-Kom Gmbh	Indirect evidence	Regensburg, GermanyHQ checked Sep 19, 2026	51-200	49 contacts →
	Indirect evidence “Die R-KOM Regensburger Telekommunikationsgesellschaft mbH wurde 1997 mit dem Ziel gegründet dem Markt ein alternatives, kostengünstiges und nachhaltiges Telekommunikationsangebot…” Source: RevenueBase Database · checked Sep 19, 2026
17	Thüringer Netkom Gmbh	Indirect evidence	Erfurt, GermanyHQ checked Sep 19, 2026	51-200	41 contacts →
	Indirect evidence “Wir, die Thüringer Netkom, bringen Bewegung in Ihr Internet!” Source: RevenueBase Database · checked Sep 19, 2026
18	Deutsche Glasfaser Business	Indirect evidence	Borken, GermanyHQ checked Sep 19, 2026	51-200	41 contacts →
	Indirect evidence “Deutsche Glasfaser Business ist der Glasfaserspezialist für Geschäftskunden und Kommunalverwaltungen.” Source: RevenueBase Database · checked Sep 19, 2026
19	Gelsen-Net Gmbh	Indirect evidence	Gelsenkirchen, GermanyHQ checked Sep 19, 2026	51-200	39 contacts →
	Indirect evidence “Besseres Internet mit zertifizierter Glasfaser erleben.” Source: RevenueBase Database · checked Sep 19, 2026
20	Greenfiber	Indirect evidence	Hamburg, GermanyHQ checked Sep 19, 2026	51-200	37 contacts →
	Indirect evidence “GREENFIBER ist Ihr Partner für schnelles, stabiles und sicheres Internet.” Source: RevenueBase Database · checked Sep 19, 2026
21	Libra Gmbh	Indirect evidence	Steinfurt, GermanyHQ checked Sep 19, 2026	501-1,000	36 contacts →
	Indirect evidence “Libra Gmbh ist eine Geschäftseinheit als Vehikel für ausgebildete und erfahrene Fachleute in der Branche für den Bau von Glasfasernetzen, wo sie ihre Fähigkeiten und Kreativität…” Source: RevenueBase Database · checked Sep 19, 2026
22	Willy.Tel Gmbh	Indirect evidence	Hamburg, GermanyHQ checked Sep 19, 2026	51-200	33 contacts →
	Indirect evidence “Wir sind ein regionales Telekommunikationsunternehmen mit Sitz in Hamburg.” Source: RevenueBase Database · checked Sep 19, 2026
23	Delta Electronics	Indirect evidence	Bodman, GermanyHQ checked Sep 19, 2026	51-200	33 contacts →
	Indirect evidence “Als einer der führenden Hersteller von Systemlösungen im Bereich der Breitbandübertragung für Kabel, Satelliten- und Glasfaser-Infrastrukturen stehen wir von DELTA Electronics für…” Source: RevenueBase Database · checked Sep 19, 2026
24	Inexio	Indirect evidence	Saarlouis, GermanyHQ checked Sep 19, 2026	201-500	31 contacts →
	Indirect evidence “Seit der Gründung 2007 hat die inexio Informationstechnologie und Telekommunikation KGaA eine eigene Telekommunikations-Infrastruktur mit mehr als 2.500 Kilometern modernstem…” Source: RevenueBase Database · checked Sep 19, 2026
25	GEO Data Gmbh	Indirect evidence	Westhausen, GermanyHQ checked Sep 19, 2026	51-200	28 contacts →
	Indirect evidence “Breitbandausbau für die Netze der Zukunft – von der Planung bis zur Realisierung.” Source: RevenueBase Database · checked Sep 19, 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: telecommunications installation 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 telecommunications installation companies.
Partial evidence: Its own public description names part of telecommunications installation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name telecommunications installation 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 619 telecommunications installation companies based in Germany

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Telecommunications installation companies based in Germany at a glance

As of Sep 19, 2026

39.5%Verified-email coverage

7.6Average contacts per company

1-10Median size (employees)

5.0%Largest-city concentration · Berlin

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

297

11-50

161

51-200

201-500

501-1,000

1,001-5,000

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 619 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 telecommunications installation 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 “telecommunications installation 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 telecommunications installation 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 telecommunications installation 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, 1,846 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 19, 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.

Telecommunications installation companies by metro

Telecommunications installation companies in Berlin31

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 telecommunications installation 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 telecommunications installation companies are there based in Germany?

RevenueBase identified 619 telecommunications installation 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?

M-Net Telekommunikations Gmbh, headquartered in Munchen, tops this list with the largest team on record.

Which city has the most telecommunications installation companies?

Berlin leads with 31 headquartered companies, followed by Hamburg (24) and Koln (9).

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 1,846 verified decision-maker contacts tracked across these 619 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 19, 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.