Company lists · Data refreshed September 2026

Top 22 Telecommunication companies based in Madrid, Spain

Name: Telecommunication companies based in Madrid, Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 13, 2026 108 companies tracked

RevenueBase identified 108 telecommunication companies headquartered in Madrid, Spain as of September 2026 and tracks 60,630 professional contacts across them, including 6,287 with verified work emails and 377 with mobile numbers. Madrid is the largest hub.

This list covers telecommunication companies headquartered in Madrid, Spain, 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 13, 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 13, 2026 86% judged on-target in blind review

108Companies

60,630Contacts tracked

6,287Verified emails

377Mobile numbers

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The 22 largest telecommunication companies based in Madrid, Spain

Ranked by team size

Top 22 of 108 telecommunication companies based in Madrid, Spain, ranked by team size, largest first. Data refreshed Sep 13, 2026. RevenueBase Smart Search rates how each company's information relates to telecommunication 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	Telefónica	Strong evidence	Madrid, SpainHQ checked Sep 13, 2026	10001+	54,718 contacts →
	Strong evidence “Telefónica is today one of the largest telecommunications companies in the world in terms of market capitalisation and number of customers.” Source: RevenueBase Database · checked Sep 13, 2026
2	Avatel Telecom	Indirect evidence	Madrid, SpainHQ checked Sep 13, 2026	1,001-5,000	698 contacts →
	Indirect evidence “Somos Avatel Telecom, compañía de telecomunicaciones en España.” Source: RevenueBase Database · checked Sep 13, 2026
3	Vodafone España	Indirect evidence	Madrid, SpainHQ checked Sep 13, 2026	1,001-5,000	613 contacts →
	Indirect evidence “Vodafone España es una empresa de telecomunicaciones con más de 15 millones de clientes.” Source: RevenueBase Database · checked Sep 13, 2026
4	Telecor	Indirect evidence	Madrid, SpainHQ checked Sep 13, 2026	501-1,000	140 contacts →
	Indirect evidence “TELECOR, S.A, somos una empresa del Grupo El Corte Inglés que comenzamos nuestra actividad en marzo de 1995 comercializando y prestando servicios de Telecomunicaciones y, a partir…” Source: RevenueBase Database · checked Sep 13, 2026
5	Coyser SA	Indirect evidence	Madrid, SpainHQ checked Sep 13, 2026	51-200	88 contacts →
	Indirect evidence “Coyser S.A.” Source: RevenueBase Database · checked Sep 13, 2026
6	B2com	Indirect evidence	Madrid, SpainHQ checked Sep 13, 2026	51-200	72 contacts →
	Indirect evidence “Premium Numbers, operador de telecomunicaciones inscrito en la CMT y con numeración propia, fue fundada en el año 2.001, siendo una de las empresas del sector de la telefonía de…” Source: RevenueBase Database · checked Sep 13, 2026
7	Huawei CBG España	Indirect evidence	Madrid, SpainHQ checked Sep 13, 2026	1,001-5,000	66 contacts →
	Indirect evidence “La misión de Huawei se basa en su propósito de enriquecer la vida a través de la comunicación.” Source: RevenueBase Database · checked Sep 13, 2026
8	Soditel	Indirect evidence	Madrid, SpainHQ checked Sep 13, 2026	11-50	55 contacts →
	Indirect evidence “SODITEL NUEVO PARTNER TECNOLÓGICO DE AASTRA EN ESPAÑA El gran nivel profesional y su avalada y reconocida garantía en la prestación de servicios profesionales, han convertido a…” Source: RevenueBase Database · checked Sep 13, 2026
9	Silbö Telecom	Indirect evidence	Madrid, SpainHQ checked Sep 13, 2026	11-50	41 contacts →
	Indirect evidence “Silbö es la nueva telco que solo te contará cosas que suenan bien.” Source: RevenueBase Database · checked Sep 13, 2026
10	Olin Group	Strong evidence	Madrid, SpainHQ checked Sep 13, 2026	n/a	32 contacts →
	Strong evidence “At Olin Group we are experts in telecommunications services in the regional market; both for wholesalers, with our high-speed Olinfra network, and for retailers through the…” Source: RevenueBase Database · checked Sep 13, 2026
11	Smartgroup	Strong evidence	Madrid, SpainHQ checked Sep 13, 2026	11-50	26 contacts →
	Strong evidence “We are a leading provider of Telecommunications services for large companies, SMEs, self-employed professionals, and individuals.” Source: RevenueBase Database · checked Sep 13, 2026
12	Comunica Telecomunicaciones	Indirect evidence	Madrid, SpainHQ checked Sep 13, 2026	11-50	23 contacts →
	Indirect evidence “In Comunica we offer connectivity solutions, telephony, IoT and cloud services tailored for businesses.” Source: RevenueBase Database · checked Sep 13, 2026
13	Tecnimart Comunicaciones	Indirect evidence	Madrid, SpainHQ checked Sep 13, 2026	11-50	22 contacts →
	Indirect evidence “Desde 1989, en TECNIMART estamos dedicados al desarrollo de proyectos de telecomunicaciones dentro y fuera de España en los sectores de Sanidad Hospitales, Seguros, Automoción y…” Source: RevenueBase Database · checked Sep 13, 2026
14	Hiper Antena	Indirect evidence	Madrid, SpainHQ checked Sep 13, 2026	11-50	18 contacts →
	Indirect evidence “Con una trayectoria de más de 30 años y una dilatada y sólida experiencia en el sector de las Telecomunicaciones, Hiper Antena ofrece al profesional todo los productos con la…” Source: RevenueBase Database · checked Sep 13, 2026
15	Balesia Technologies, INC	Strong evidence	Madrid, SpainHQ checked Sep 13, 2026	51-200	13 contacts →
	Strong evidence “Balesia Technologies Inc, part of the Balesia group, an American company with more than 40 years of experience and telecommunications management experience in more than 60…” Source: RevenueBase Database · checked Sep 13, 2026
16	MINTT	Indirect evidence	Madrid, SpainHQ checked Sep 13, 2026	11-50	10 contacts →
	Indirect evidence “Mintt es el operador de telecomunicaciones (licencia de la CMT) especializado en servicios para empresas, que automatizan los procesos de atención de sus usuarios.” Source: RevenueBase Database · checked Sep 13, 2026
17	TEL Iberica SA	Indirect evidence	Madrid, SpainHQ checked Sep 13, 2026	51-200	10 contacts →
	Indirect evidence “Tel Telecomunicaciones es una de las empresas más importantes y cualificadas para prestar servicios en el campo de las telecomunicaciones.” Source: RevenueBase Database · checked Sep 13, 2026
18	Lineox	Indirect evidence	Madrid, SpainHQ checked Sep 13, 2026	1-10	9 contacts →
	Indirect evidence “Lineox es una compañía creada por Asterion Industrial Partners - firma de inversión independiente - tras adquirir toda la red de radioenlaces de Telefónica en España.” Source: RevenueBase Database · checked Sep 13, 2026
19	Oasip. Servicio Integral DE Comunicaciones	Indirect evidence	Madrid, SpainHQ checked Sep 13, 2026	1-10	5 contacts →
	Indirect evidence “Servicio Integral de Comunicaciones Soluciones de Telefonía Móvil Planes claros Tarifas únicas Sin Permanencia Soluciones de Centralita Virtual Voz IP con la máxima calidad y…” Source: RevenueBase Database · checked Sep 13, 2026
20	Digital Solutions & Global Cloud GOC	Indirect evidence	Madrid, SpainHQ checked Sep 13, 2026	11-50	2 contacts →
	Indirect evidence “Nuestra misión desde DSGC es ofrecer y gestionar servicios digitales para poder administrar las telecomunicaciones de cualquier compañía, desde el puesto de trabajo hasta la…” Source: RevenueBase Database · checked Sep 13, 2026
21	infocaller.com	Strong evidence	Madrid, SpainHQ checked Sep 13, 2026	11-50	2 contacts →
	Strong evidence “Infocaller combines the latest telecommunications technologies with the power of the internet in order to provide simple yet powerful communication services for companies…” Source: RevenueBase Database · checked Sep 13, 2026
22	Silvan Comunicaciones	Indirect evidence	Madrid, SpainHQ checked Sep 13, 2026	11-50	1 contacts →
	Indirect evidence “Silvan comunicaciones nace en el año 2013, como resultado del análisis del mercado de las telecomunicaciones en constante evolución, y ante la necesidades de muchos sus clientes…” Source: RevenueBase Database · checked Sep 13, 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: 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 22 of 108 telecommunication companies based in Madrid, Spain

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Telecommunication companies based in Madrid, Spain at a glance

As of Sep 13, 2026

10.4%Verified-email coverage

0.6%Mobile-number coverage

561.4Average contacts per company

11-50Median size (employees)

98.1%Largest-city concentration · Madrid

Sep 13, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 16.0d

4,3150–30

1,25631–60

2061–90

390–180

693180+

Company record updated

Median 81.0d

00–30

13,44431–60

36,47961–90

8,66890–180

2,039180+

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 Madrid, Spain 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 Madrid 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, 6,287 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 13, 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 in Spain

Telecommunication companies in Madrid106
Telecommunication companies in Barcelona49

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 Madrid, Spain?

RevenueBase identified 108 telecommunication companies headquartered in Madrid, Spain 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?

Telefónica, headquartered in Madrid, tops this list with the largest team on record.

Which city has the most telecommunication companies?

Madrid leads with 106 headquartered companies, followed by Barcelona (49) and Malaga (22).

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 6,287 verified decision-maker contacts tracked across these 108 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 13, 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.