Company lists · Data refreshed September 2026

Top 25 Telecommunications contractors based in Spain

Name: Telecommunications contractors based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 1,009 companies tracked

RevenueBase identified 1,009 telecommunications contractors headquartered in Spain as of September 2026 and tracks 13,071 professional contacts across them, including 1,009 with verified work emails. Madrid is the largest hub.

This list covers telecommunications contractors 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

1,009Companies

13,071Contacts tracked

1,009Verified emails

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The 25 largest telecommunications contractors based in Spain

Ranked by team size

Top 25 of 1,009 telecommunications contractors 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 contractors: 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	ZENER	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	5,001-10,000	1,207 contacts →
	Indirect evidence “En Zener crecemos acelerando el crecimiento de nuestros clientes.” Source: RevenueBase Database · checked Sep 19, 2026
2	Nunsys	Indirect evidence	Paterna, SpainHQ checked Sep 19, 2026	1,001-5,000	739 contacts →
	Indirect evidence “NUNSYS es una empresa especializada en la Implantación de Soluciones Integrales de Tecnología.” Source: RevenueBase Database · checked Sep 19, 2026
3	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
4	Comfica Soluciones Integrales S.L	Indirect evidence	Fuenlabrada, SpainHQ checked Sep 19, 2026	201-500	684 contacts →
	Indirect evidence “Empresa especializada en la ingenieria, desarrollo, construccion, instalación, y puesta en marcha de instalaciones de telecomunicaciones, electricidad, señalización, redes de…” Source: RevenueBase Database · checked Sep 19, 2026
5	Insyte Instalaciones	Indirect evidence	Getafe, SpainHQ checked Sep 19, 2026	1,001-5,000	628 contacts →
	Indirect evidence “Insyte Instalaciones inicia su actividad en 1990 como empresa instaladora en el sector eléctrico y de telecomunicaciones.” Source: RevenueBase Database · checked Sep 19, 2026
6	Circet España	Indirect evidence	Sevilla, SpainHQ checked Sep 19, 2026	1,001-5,000	455 contacts →
	Indirect evidence “Circet España, empresa líder del sector de las telecomunicaciones en España, con implantación a nivel Nacional.” Source: RevenueBase Database · checked Sep 19, 2026
7	Simalga	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	201-500	181 contacts →
	Indirect evidence “Somos una empresa de Servicios Técnicos cuyo campo de actuación abarca todas las fases de las instalaciones de edificios, desde la concepción y diseño hasta el mantenimiento y…” Source: RevenueBase Database · checked Sep 19, 2026
8	Powernet	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	51-200	150 contacts →
	Indirect evidence “Somos una marca global de Ingeniería en integración de soluciones de Telecomunicaciones y Sistemas IT con más de 35 años de experiencia.” Source: RevenueBase Database · checked Sep 19, 2026
9	Inet Smart ITC	Indirect evidence	Cornellà De Llobregat, SpainHQ checked Sep 19, 2026	201-500	139 contacts →
	Indirect evidence “Inet es una empresa del grupo AXIS CORPORATE especializada en procesos de despliegue y mantenimiento de infraestructuras tecnológicas y comunicaciones para empresas.” Source: RevenueBase Database · checked Sep 19, 2026
10	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
11	Ambar Telecomunicaciones	Indirect evidence	Santander, SpainHQ checked Sep 19, 2026	201-500	126 contacts →
	Indirect evidence “Ámbar Telecomunicaciones es una empresa de ingeniería especializada en la integración global de sistemas de comunicación, que centra su actividad en el diseño, instalación y…” Source: RevenueBase Database · checked Sep 19, 2026
12	Instelca	Indirect evidence	Málaga, SpainHQ checked Sep 19, 2026	201-500	118 contacts →
	Indirect evidence “El Grupo INSTELCA es proveedor global de servicios de Telecomunicaciones, Redes e Informática con más de 30 años de experiencia y con una clara orientación al clientes que nos ha…” Source: RevenueBase Database · checked Sep 19, 2026
13	Smartel España	Indirect evidence	Erandio, SpainHQ checked Sep 19, 2026	51-200	110 contacts →
	Indirect evidence “Smart Telecom Consulting, empresa de ingeniería especializada en el campo de la telefonia móvil ofreciendo soluciones integrales a nuestros clientes desde el año 2004.” Source: RevenueBase Database · checked Sep 19, 2026
14	Cableven	Indirect evidence	Málaga, SpainHQ checked Sep 19, 2026	501-1,000	103 contacts →
	Indirect evidence “Empresa cualificada y especializada en la instalación y mantenimiento de redes y equipos de telecomunicaciones.” Source: RevenueBase Database · checked Sep 19, 2026
15	Alumbrados Viarios S.A, Aluvisa	Indirect evidence	Cornella De Llobregat, SpainHQ checked Sep 19, 2026	51-200	96 contacts →
	Indirect evidence “ALUVISA es una empresa orientada al servicio, altamente especializada no solo en la ejecución de proyectos de instalación y mantenimiento de equipos tradicionales sino también en…” Source: RevenueBase Database · checked Sep 19, 2026
16	MDTEL	Partial evidence	Madrid, SpainHQ checked Sep 19, 2026	51-200	93 contacts →
	Partial evidence “mdtel is a manufacturer and integrator of corporate telecommunications solutions for business environments with more than 20 years of experience.” Source: RevenueBase Database · checked Sep 19, 2026
17	Cablescom	Indirect evidence	Zaragoza, SpainHQ checked Sep 19, 2026	201-500	92 contacts →
	Indirect evidence “Cablescom es una de las principales compañías europeas dedicadas al diseño, fabricación y comercialización de cables de telecomunicaciones, señalización y fibra óptica.” Source: RevenueBase Database · checked Sep 19, 2026
18	Coyser SA	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	51-200	88 contacts →
	Indirect evidence “Coyser S.A.” Source: RevenueBase Database · checked Sep 19, 2026
19	Iquord	Indirect evidence	Aviles, SpainHQ checked Sep 19, 2026	51-200	85 contacts →
	Indirect evidence “Electroinnova instalaciones y mantenimientos S.L es una empresa asturiana con una clara voación de expansión internacional que nace con el objetivo de ofrecer y solucionar…” Source: RevenueBase Database · checked Sep 19, 2026
20	ITM Global	Indirect evidence	Cartes, SpainHQ checked Sep 19, 2026	201-500	82 contacts →
	Indirect evidence “ITM Global es una empresa dedicada al mundo de las nuevas tecnologías, seguridad y las telecomunicaciones, abarcando una gran cantidad de campos de trabajo en estas materias y…” Source: RevenueBase Database · checked Sep 19, 2026
21	Deltacomgroup	Partial evidence	San Sebastián De Los Reyes, SpainHQ checked Sep 19, 2026	201-500	81 contacts →
	Partial evidence “Your Network is Our Business DeltaComGroup is a global supplier of top quality telecommunications systems, components and services.” Source: RevenueBase Database · checked Sep 19, 2026
22	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
23	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
24	Datatronics	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	11-50	63 contacts →
	Indirect evidence “Datatronics is a seasoned Telco System Integrator with over thirty years of experience supporting communication service providers, from small operators and MVNOs to large…” Source: RevenueBase Database · checked Sep 19, 2026
25	Contecnow	Indirect evidence	Barcelona, SpainHQ checked Sep 19, 2026	51-200	59 contacts →
	Indirect evidence “Contec Consulting es una consultoría independiente de telecomunicaciones, con capital 100 % nacional y creada en el año Damos soporte a nuestros clientes en los siguientes pilares…” 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 contractors. 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 contractors.
Partial evidence: Its own public description names part of telecommunications contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name telecommunications contractors. 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 1,009 telecommunications contractors based in Spain

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Telecommunications contractors based in Spain at a glance

As of Sep 19, 2026

7.7%Verified-email coverage

13.0Average contacts per company

11-50Median size (employees)

14.9%Largest-city concentration · Madrid

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

484

11-50

387

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 1,009 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 contractors, 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 contractors”. 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 contractors), 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 contractors, 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, 1,009 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 contractors by metro

Telecommunications contractors in Madrid150
Telecommunications contractors in Barcelona50
Telecommunications contractors in Malaga26

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 contractors, 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 contractors are there based in Spain?

RevenueBase identified 1,009 telecommunications contractors 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?

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

Which city has the most telecommunications contractors?

Madrid leads with 150 headquartered companies, followed by Barcelona (50) and Malaga (26).

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 1,009 verified decision-maker contacts tracked across these 1,009 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.