Company lists · Data refreshed November 2026

Top 25 Telecom contractors based in Spain

RevenueBase identified 908 company matches for telecom contractors associated with Spain as of November 2026 and tracks 14,140 professional contacts across them, including 1,249 with verified work emails. Madrid is the largest hub.

This list covers company matches for telecom contractors associated with Spain, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
908Companies
14,140Contacts tracked
1,249Verified emails
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The 25 largest telecom contractors based in Spain

Ranked by team size
Top 25 of 908 company matches for telecom contractors based in Spain, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchMadrid, SpainHQ recorded Nov 6, 20265,001-10,0001,358 contacts →

Exact match

“En Zener crecemos acelerando el crecimiento de nuestros clientes.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchMadrid, SpainHQ recorded Nov 6, 20261,001-5,000863 contacts →

Exact match

“Created in 1919, SEMI is a leading company in the electricity and industrial sector.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchCórdoba, SpainHQ recorded Nov 6, 20261,001-5,000760 contacts →

Exact match

“OFG is an international company with more than 20 years of experience in the telecommunications sector.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchFuenlabrada, SpainHQ recorded Nov 6, 2026201-500755 contacts →

Exact match

“Empresa especializada en la ingenieria, desarrollo, construccion, instalación, y puesta en marcha de instalaciones de telecomunicaciones, electricidad, señalización, redes de…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchGetafe, SpainHQ recorded Nov 6, 20261,001-5,000707 contacts →

Exact match

“Insyte Instalaciones inicia su actividad en 1990 como empresa instaladora en el sector eléctrico y de telecomunicaciones.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchSeville, SpainHQ recorded Nov 6, 20261,001-5,000529 contacts →

Exact match

“Circet España, empresa líder del sector de las telecomunicaciones en España, con implantación a nivel Nacional.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchA Coruña, SpainHQ recorded Nov 6, 2026501-1,000435 contacts →

Exact match

“CommCenter es uno de los distribuidores de telecomunicaciones independientes de mayor impacto en nuestro país.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchDos Hermanas, SpainHQ recorded Nov 6, 20261,001-5,000380 contacts →

Exact match

“Ametel desarrolla proyectos y servicios para infraestructuras eléctricas, telecomunicaciones, energías renovables y redes de gas.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchBarcelona, SpainHQ recorded Nov 6, 202651-200306 contacts →

Exact match

“Adamo is a telecom operator with Swedish origin operating in Spain since 2007.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchMadrid, SpainHQ recorded Nov 6, 2026201-500288 contacts →

Exact match

“Lps Grupo has extensive experience in the telecommunications sector thanks to a team of professionals with knowledge in the development of projects and technical feasibility, in…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchCornellà De Llobregat, SpainHQ recorded Nov 6, 2026201-500150 contacts →

Exact match

“Inet es una empresa del grupo AXIS CORPORATE especializada en procesos de despliegue y mantenimiento de infraestructuras tecnológicas y comunicaciones para empresas.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchMálaga, SpainHQ recorded Nov 6, 2026201-500145 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchAlicante, SpainHQ recorded Nov 6, 2026201-500139 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchMálaga, SpainHQ recorded Nov 6, 2026501-1,000123 contacts →

Exact match

“Empresa cualificada y especializada en la instalación y mantenimiento de redes y equipos de telecomunicaciones.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchAlcobendas, SpainHQ recorded Nov 6, 2026201-500121 contacts →

Exact match

“NOKIA TECSS somos una empresa de servicios del sector de las Telecomunicaciones.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchErandio, SpainHQ recorded Nov 6, 202651-200119 contacts →

Exact match

“Smart Telecom Consulting, empresa de ingeniería especializada en el campo de la telefonia móvil ofreciendo soluciones integrales a nuestros clientes desde el año 2004.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchZaragoza, SpainHQ recorded Nov 6, 2026201-500107 contacts →

Exact match

“Cablescom es una de las principales compañías europeas dedicadas al diseño, fabricación y comercialización de cables de telecomunicaciones, señalización y fibra óptica.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchMadrid, SpainHQ recorded Nov 6, 202651-200106 contacts →

Exact match

“Grupo Maipú nace en España en 1995.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchMadrid, SpainHQ recorded Nov 6, 202651-200104 contacts →

Exact match

“mdtel is a manufacturer and integrator of corporate telecommunications solutions for business environments with more than 20 years of experience.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchMadrid, SpainHQ recorded Nov 6, 202651-20099 contacts →

Exact match

“Coyser S.A.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchBilbao, SpainHQ recorded Nov 6, 202651-20098 contacts →

Exact match

“SITER INGENIERÍA DE INFRAESTRUCTURAS es una compañía con más de 25 años de historia, que opera dando soporte a operadores y empresas relacionadas con el desarrollo de…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchAviles, SpainHQ recorded Nov 6, 202651-20095 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchMadrid, SpainHQ recorded Nov 6, 202651-20087 contacts →

Exact match

“Apostando por la innovación y soñando con el desarrollo de una consolidada red de Telecomunicaciones en España, nace Tower Consultores en 1996.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchSan Sebastián De Los Reyes, SpainHQ recorded Nov 6, 2026201-50084 contacts →

Exact match

“Your Network is Our Business DeltaComGroup is a global supplier of top quality telecommunications systems, components and services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchArteixo, SpainHQ recorded Nov 6, 202651-20082 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 908 telecom contractors based in Spain

See the full list, filter by size, metro and specialty, and access 1,249 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Telecom contractors based in Spain at a glance

As of Nov 6, 2026
8.8%Verified-email coverage
15.6Average contacts per company
11-50Median size (employees)
15.1%Largest-city concentration · Madrid
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
413
11-50
356
51-200
89
201-500
23
501-1,000
4
1,001-5,000
7
5,001-10,000
1

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 908 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with Spain whose business descriptions match “telecom contractors” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 1,249 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “telecom contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many telecom contractors are there based in Spain?

RevenueBase identified 908 company matches for telecom contractors associated with Spain as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

ZENER tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most telecom contractors?

Madrid leads with 137 company records, followed by Barcelona (40) and Malaga (22).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 1,249 professional contacts with verified work emails tracked across these 908 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 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 SmartSearch, 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.