Company lists · Data refreshed September 2026

Top 25 Telecommunications companies with research centers based in Spain

Name: Telecommunications companies with research centers based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 205 companies tracked

RevenueBase identified 205 telecommunications companies with research centers headquartered in Spain as of September 2026 and tracks 58,006 professional contacts across them, including 6,227 with verified work emails. Madrid is the largest hub.

This list covers telecommunications companies with research centers headquartered in 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 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

205Companies

58,006Contacts tracked

6,227Verified emails

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The 25 largest telecommunications companies with research centers based in Spain

Ranked by team size

Top 25 of 205 telecommunications companies with research centers based in Spain, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to telecommunications companies with research centers: 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	Partial evidence	Madrid, SpainHQ checked Sep 19, 2026	10001+	54,718 contacts →
	Partial 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 19, 2026
2	OFG	Partial evidence	Córdoba, SpainHQ checked Sep 19, 2026	1,001-5,000	701 contacts →
	Partial evidence “OFG is an international company with more than 20 years of experience in the telecommunications sector.” Source: RevenueBase Database · checked Sep 19, 2026
3	Centre Tecnològic DE Telecomunicacions DE Catalunya Cttc	Strong evidence	Castelldefels, SpainHQ checked Sep 19, 2026	51-200	273 contacts →
	Strong evidence “The Centre Tecnològic de Telecomunicacions de Catalunya (CTTC) is a non-profit research center, from a public initiative and with a high degree of self-financing, open to the…” Source: RevenueBase Database · checked Sep 19, 2026
4	Cableworld	Indirect evidence	Alicante, SpainHQ checked Sep 19, 2026	201-500	132 contacts →
	Indirect evidence “Cableworld es la compañía de servicios de telecomunicaciones por fibra óptica líder en en sus zonas de influencia, en la que ofrecemos de manera integrada servicios de Internet…” Source: RevenueBase Database · checked Sep 19, 2026
5	Centum Research & Technology	Strong evidence	Vigo, SpainHQ checked Sep 19, 2026	51-200	80 contacts →
	Strong evidence “CENTUM research & technology is the Product Development Center of CENTUM GLOBAL CORPORATION.” Source: RevenueBase Database · checked Sep 19, 2026
6	CIE Tecnologías	Indirect evidence	Arteixo, SpainHQ checked Sep 19, 2026	51-200	78 contacts →
	Indirect evidence “CIE Tecnologías, es hoy una empresa establecida en el sector de las telecomunicaciones y desarrolla su actividad centrándose en el diseño e implementación de tecnologías e…” Source: RevenueBase Database · checked Sep 19, 2026
7	B2com	Indirect evidence	Madrid, SpainHQ checked Sep 19, 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 19, 2026
8	Ausarta	Indirect evidence	Erandio, SpainHQ checked Sep 19, 2026	51-200	72 contacts →
	Indirect evidence “Tu operador de Telecomunicaciones” Source: RevenueBase Database · checked Sep 19, 2026
9	Atlanttic	Strong evidence	Vigo, SpainHQ checked Sep 19, 2026	201-500	62 contacts →
	Strong evidence “atlanTTic is the research center for Telecommunication Technologies promoted by the University of Vigo (Galicia, Spain).” Source: RevenueBase Database · checked Sep 19, 2026
10	ISP Grup	Indirect evidence	Les Franqueses Del Vallés, SpainHQ checked Sep 19, 2026	201-500	50 contacts →
	Indirect evidence “ISP Grup nació en con la visión de que las telecomunicaciones serían el futuro.” Source: RevenueBase Database · checked Sep 19, 2026
11	Infopyme Comunicaciones	Indirect evidence	Zaragoza, SpainHQ checked Sep 19, 2026	51-200	43 contacts →
	Indirect evidence “English below) Fundada en 1998 para atender al mercado de las telecomunicaciones públicas, y disponiendo de unas instalaciones de 1.500 m2, destinadas al diseño y fabricación…” Source: RevenueBase Database · checked Sep 19, 2026
12	Comunitelia	Indirect evidence	Tomelloso, SpainHQ checked Sep 19, 2026	11-50	41 contacts →
	Indirect evidence “Comunitelia es una empresa dedicada al desarrollo de todo tipo proyectos y servicios de telecomunicaciones y tecnología a medida para grandes empresas y ayuntamientos e…” Source: RevenueBase Database · checked Sep 19, 2026
13	Itelsis Group	Partial evidence	Santiago De Compostela, SpainHQ checked Sep 19, 2026	51-200	34 contacts →
	Partial evidence “ITELSIS is a Business Group focusing its activity on: the Telecommunications sector, designing and manufacturing its own products; the delivery of professional services; and in…” Source: RevenueBase Database · checked Sep 19, 2026
14	ISC	Indirect evidence	Barcelona, SpainHQ checked Sep 19, 2026	51-200	24 contacts →
	Indirect evidence “Conectamos tus proyectos.” Source: RevenueBase Database · checked Sep 19, 2026
15	Level Electronics	Indirect evidence	Palma De Mallorca, SpainHQ checked Sep 19, 2026	51-200	21 contacts →
	Indirect evidence “El GRUPO LEVEL ELECTRONICS, es un grupo de empresas especializadas en los distintos sectores de las telecomunicaciones y de la informática.” Source: RevenueBase Database · checked Sep 19, 2026
16	Conecta Pymes	Indirect evidence	Málaga, SpainHQ checked Sep 19, 2026	1-10	17 contacts →
	Indirect evidence “Bienvenid@ a Conecta Pymes.” Source: RevenueBase Database · checked Sep 19, 2026
17	Cloud Comunicaciones	Indirect evidence	Cerdanyola Del Valles, SpainHQ checked Sep 19, 2026	11-50	13 contacts →
	Indirect evidence “Cloud Comunicaciones, es una empresa de telecomunicaciones con más de 30 años de experiencia enfocada a prestar servicios y soluciones a otras empresas.” Source: RevenueBase Database · checked Sep 19, 2026
18	Aplicaciones Electricas Ene, S.A	Indirect evidence	Barcelona, SpainHQ checked Sep 19, 2026	11-50	13 contacts →
	Indirect evidence “ENE fué creada en 1947, orientada hacia el campo de la telefonía.” Source: RevenueBase Database · checked Sep 19, 2026
19	Emser Innova	Indirect evidence	Barcelona, SpainHQ checked Sep 19, 2026	51-200	13 contacts →
	Indirect evidence “Ingeniería comprometida con la innovación, con amplia experiencia en el ámbito industrial y de las telecomunicaciones, así como en el desarrollo de software de integración.” Source: RevenueBase Database · checked Sep 19, 2026
20	Comutel	Indirect evidence	Valencia/valència, SpainHQ checked Sep 19, 2026	51-200	12 contacts →
	Indirect evidence “Comutel es una empresa de Telecomunicaciones en Valencia líder en el sector.” Source: RevenueBase Database · checked Sep 19, 2026
21	Innubo	Indirect evidence	Manresa, SpainHQ checked Sep 19, 2026	11-50	11 contacts →
	Indirect evidence “INNUBO es un operador de telecomunicaciones especializado en ofrecer servicios de valor a empresas que forma parte de un grupo empresarial que lleva desde 1989 ofrece soluciones…” Source: RevenueBase Database · checked Sep 19, 2026
22	Moncisa Montajes Y Obra Civil	Indirect evidence	Prendes, SpainHQ checked Sep 19, 2026	51-200	11 contacts →
	Indirect evidence “Desde al año de su fundación, 1989, Montajes y Obra Civil S.A.(MONCISA) se ha convertido en una empresa puntera en el campo de la energía eléctrica.” Source: RevenueBase Database · checked Sep 19, 2026
23	Lambda Antenas S.L	Partial evidence	Alcobendas, SpainHQ checked Sep 19, 2026	11-50	11 contacts →
	Partial evidence “Lambda Antenas is a company specialized in telecommunications sector with more than 30 years of experience in manufacturing all kind of professional components.” Source: RevenueBase Database · checked Sep 19, 2026
24	Digatel Telecomunicaciones	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	11-50	11 contacts →
	Indirect evidence “Somos una empresa dedicada a brindar soluciones para el despliegue y mantenimiento de infraestructura de redes de telecomunicaciones, especialmente las que requieren del uso de…” Source: RevenueBase Database · checked Sep 19, 2026
25	TEL Iberica SA	Indirect evidence	Madrid, SpainHQ checked Sep 19, 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 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 companies with research centers. 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 companies with research centers.
Partial evidence: Its own public description names part of telecommunications companies with research centers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name telecommunications companies with research centers. 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 205 telecommunications companies with research centers based in Spain

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Telecommunications companies with research centers based in Spain at a glance

As of Sep 19, 2026

10.7%Verified-email coverage

283.0Average contacts per company

11-50Median size (employees)

15.6%Largest-city concentration · Madrid

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for Spain, so it is reported there. Company counts and contact totals on this page are exact for Spain, over 205 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 companies with research centers, 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 Spain whose own description of what they do matches “telecommunications companies with research centers”. 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 companies with research centers), 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 companies with research centers, and records with no verified work email. Companies headquartered outside Spain 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, 6,227 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 companies with research centers by metro

Telecommunications companies with research centers in Madrid32

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 companies with research centers, 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 companies with research centers are there based in Spain?

RevenueBase identified 205 telecommunications companies with research centers headquartered in 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 telecommunications companies with research centers?

Madrid leads with 32 headquartered companies, followed by Barcelona (15) and Malaga (11).

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 6,227 verified decision-maker contacts tracked across these 205 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.